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List of Freshwater Fishes reported from Peru
n = 965
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Table 1: 924 species currently present in the country/island (endemic, native, introduced, reintroduced);
Table 2: 11 species possibly present in the country/island (stray, questionable);
Table 3: 30 species demonstrated to be absent in the country/island (extirpated, not established, misidentification, error).
Table 4: 965 species reported from the country/island altogether.
Table 1: 924 species currently present in the country/island.
     
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Family Species Author Info Occurrence Common names Abundance Max length Maturity Remark Photo
Anostomidae Abramites hypselonotus (Günther, 1868) Fr, Or native  Lisa abramites (Spanish), Abramites (Spanish), San Pedrito (Spanish), Headstander (English)  14.00 cm TL male/unsexed  Occurs in the Amazon, Nanay and Itaya (near Iquitos) Rivers. Museum: Peruvian Amazon, ANSP 21434 (Ref. 9743). Exported as an aquarium fish (Ref. 9235). 
Loricariidae Acanthicus hystrix Spix & Agassiz, 1829 Fr, Or native  Carachama mama (Spanish), Carachama (Spanish)  53.00 cm SL male/unsexed  Occurs in the Amazon River and its tributaries (Ref. 6329). Exported as an aquarium fish (Ref. 9235). Also Ref. 36713. 
Doradidae Acanthodoras cataphractus (Linnaeus, 1758) Fr native   11.50 cm SL male/unsexed   
Doradidae Acanthodoras spinosissimus (Eigenmann & Eigenmann, 1888) Fr native   13.70 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Trichomycteridae Acanthopoma annectens Lütken, 1892 Fr native   12.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39970). Type locality: Río Huallaga, Upper Amazon system, Peru (Ref. 26282, 6868).  No picture yet.
Cichlidae Acarichthys heckelii (Müller & Troschel, 1849) Fr native   19.50 cm SL male/unsexed   
Cichlidae Acaronia nassa (Heckel, 1840) Fr native   16.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Characidae Acestrocephalus boehlkei Menezes, 1977 Fr native  Mojara (Spanish)  13.50 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). Also collected from the blackwater near Pueblo Nuevo flowing into Rio Tulumayo, and the mainstream of Rio Tulumayo, Huánuco (Ref. 27925). Also Ref. 36811. 
Acestrorhynchidae Acestrorhynchus abbreviatus (Cope, 1878) Fr native   30.00 cm SL male/unsexed  Type locality: Nauta, Amazon basin.  No picture yet.
Acestrorhynchidae Acestrorhynchus altus Menezes, 1969 Fr native  Peje zorro (Spanish)  23.30 cm SL male/unsexed  Known from the Amazon River. 
Acestrorhynchidae Acestrorhynchus falcatus (Bloch, 1794) Fr native   30.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 38248). Occurs in Rio Pastaza (Ref 12225). 
Acestrorhynchidae Acestrorhynchus falcirostris (Cuvier, 1819) Fr, Or native  Pez cachorro (Spanish), Cachorro amazónico (Spanish), Peje zorro (Spanish), Pez zorro (Spanish)  45.00 cm SL male/unsexed  Occurs in the Amazon, Ucayali, Marañon (and adjoining lagoons) and Nanay Rivers. Exported as an aquarium fish (Ref. 9235). 
Acestrorhynchidae Acestrorhynchus microlepis (Jardine, 1841) Fr, Or native  Pez zorro (Spanish), Cachorro (Spanish), Pejezorro (Spanish), Pez cachorro (Spanish)  37.00 cm TL male/unsexed  Occurs in Marañón and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Achiridae Achirus mazatlanus (Steindachner, 1869) Fr, Br, M native  Lenguado redondo (Spanish), Sol (Spanish)  22.50 cm TL male/unsexed   
Characidae Acrobrycon ipanquianus (Cope, 1877) Fr native  Mojara (Spanish)  12.00 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Found in the Urubamba River basin in Ucayali River drainage (Ref. 38597). Also Ref. 94771. 
Apteronotidae Adontosternarchus balaenops (Cope, 1878) Fr native  Macana (Spanish)  25.00 cm TL male/unsexed  Amazon river. 
Apteronotidae Adontosternarchus nebulosus Lundberg & Cox Fernandes, 2007 Fr native   21.80 cm TL male/unsexed  Known from the Amazon basin (Ref. 78211). 
Cichlidae Aequidens patricki Kullander, 1984 Fr endemic   11.60 cm SL male/unsexed  Found only in Aguaytía and Pachitea rivers of the Amazon River basin (Ref. 36377). Also Ref. 12251. 
Cichlidae Aequidens tetramerus (Heckel, 1840) Fr native   19.20 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Doradidae Agamyxis pectinifrons (Cope, 1870) Fr native  Bagre (Spanish)  15.00 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Auchenipteridae Ageneiosus marmoratus Eigenmann, 1912 Fr native   18.50 cm SL male/unsexed   
Auchenipteridae Ageneiosus ucayalensis Castelnau, 1855 Fr native  Cunshi novia (Spanish)  35.20 cm SL male/unsexed   
Triportheidae Agoniates anchovia Eigenmann, 1914 Fr native  Mojarita (Spanish)  14.80 cm SL male/unsexed    No picture yet.
Pimelodidae Aguarunichthys torosus Stewart, 1986 Fr endemic   34.60 cm SL male/unsexed  Known from Cenepa River basin in Amazon River drainage (Ref. 36506). Type locality: Río Cenepa, Departo. Amazonas, Peru, approximately 4°28'S, 78°10'W, elev. ca. 210 m. (Ref. 26282, 6868). 
Aspredinidae Amaralia hypsiura (Kner, 1855) Fr native   13.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Doradidae Amblydoras monitor (Cope, 1872) Fr native  Bagre (Spanish)  9.00 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). Recorded from in the Rio Ambyiacu (Ref. 6868). Also Ref. 6868.  No picture yet.
Doradidae Amblydoras nauticus (Cope, 1874) Fr native  Bagre (Spanish)  11.10 cm SL male/unsexed  Known from the Amazon River (Ref. 6329, 37054). 
Rivulidae Anablepsoides atratus (Garman, 1895) Fr native   4.00 cm TL male/unsexed  Known from the Amazon River (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides christinae (Huber, 1992) Fr endemic   6.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides derhami (Fels & Huber, 1985) Fr endemic   5.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides elongatus (Fels & de Rham, 1981) Fr endemic   5.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139.  No picture yet.
Rivulidae Anablepsoides intermittens (Fels & de Rham, 1981) Fr endemic   7.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139.  No picture yet.
Rivulidae Anablepsoides iridescens (Fels & de Rham, 1981) Fr endemic   7.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides lineasoppilatae Valdesalici & Schindler, 2013 Fr native   3.73 cm SL male/unsexed ;4.08 cm SL female  Known from a small stream belonging to the San Gaban river drainage, at an altitude of about 600 m asl, Departamento Puno, and from a small spring in the Araza river drainage, at an altitude of about 450 m asl, Departamento Madre de Dios, southeastern Peru (Ref. 94121).  No picture yet.
Rivulidae Anablepsoides ophiomimus (Huber, 1992) Fr native   8.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides ornatus (Garman, 1895) Fr native   4.00 cm TL male/unsexed   
Rivulidae Anablepsoides parlettei (Valdesalici & Schindler, 2011) Fr native   3.77 cm SL male/unsexed  Found in a small stream belonging to the río Araza in the vicinity of Vitobamba, at an altitude of about 820 m asl, Departamento Cusco, south eastern Peru (Ref. 88925).  No picture yet.
Rivulidae Anablepsoides peruanus (Regan, 1903) Fr endemic   5.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides rubrolineatus (Fels & de Rham, 1981) Fr endemic   6.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Anablepsoides speciosus (Fels & de Rham, 1981) Fr endemic   3.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Doradidae Anadoras grypus (Cope, 1872) Fr native  Bagre (Spanish)  14.60 cm SL male/unsexed  Known from the Ambyiacu River (Ref. 6868). Found in the Amazon River (Ref. 37054). 
Engraulidae Anchoa curta (Jordan & Gilbert, 1882) Fr, Br, M native  Anchoa (Spanish)  8.90 cm TL male/unsexed  Reported from Puerto Pizarro (Ref. 96339). 
Engraulidae Anchoa spinifer (Valenciennes, 1848) Fr, Br, M native  Anchoa naranja (Spanish)  24.00 cm TL male/unsexed   
Engraulidae Anchoviella alleni (Myers, 1940) Fr native   8.80 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 50628). 
Engraulidae Anchoviella guianensis (Eigenmann, 1912) Fr native  Anchoveta (Spanish)  11.30 cm TL male/unsexed  Known from the Amazon River. 
Engraulidae Anchoviella hernanni Loeb, Varella & Menezes, 2018 Fr native   2.97 cm SL male/unsexed  Type locality of the holotype of Anchoviella hernanni: Rio Urubamba, Rio Ucayali basin, Atalaya (Ref. 128810).  No picture yet.
Engraulidae Anchoviella jamesi (Jordan & Seale, 1926) Fr native   5.02 cm SL male/unsexed   
Loricariidae Ancistrus bolivianus (Steindachner, 1915) Fr native   8.80 cm SL male/unsexed  Known from Madre de Dios Rive basin (Ref. 36713).  No picture yet.
Loricariidae Ancistrus bufonius (Valenciennes, 1840) Fr endemic  Carachama (Spanish)  11.50 cm SL male/unsexed  Known from Apurimac River basin (Ref. 6868, 36713). 
Loricariidae Ancistrus dubius Eigenmann & Eigenmann, 1889 Fr native   12.60 cm SL male/unsexed    No picture yet.
Loricariidae Ancistrus greeni (Isbrücker, 2001) Fr native  Carachama (Spanish)  6.50 cm TL male/unsexed    No picture yet.
Loricariidae Ancistrus heterorhynchus (Regan, 1912) Fr endemic  Carachama (Spanish)  6.30 cm SL male/unsexed  Known from the Inambari River basin in Madre de Dios River drainage (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus hoplogenys (Günther, 1864) Fr native  Carachama (Spanish)  15.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36713). Found in the Ampyiacu River (Ref. 6868). 
Loricariidae Ancistrus jelskii (Steindachner, 1876) Fr endemic  Carachama (Spanish)  8.00 cm TL male/unsexed  Known from Tulumayo River basin in upper Ucayali River drainage (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus latifrons (Günther, 1869) Fr native   15.40 cm SL male/unsexed  Known from the upper Amazon River (Ref. 6868, 36713).  No picture yet.
Loricariidae Ancistrus malacops (Cope, 1872) Fr endemic  Carachama (Spanish)  7.70 cm SL male/unsexed  Known from the Ampiyacu River basin (Ref. 36713).  No picture yet.
Loricariidae Ancistrus marcapatae (Regan, 1904) Fr endemic  Carachama (Spanish)  12.40 cm TL male/unsexed  Known from the Inambari River basin in the Madeira River drainage (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus occloi Eigenmann, 1928 Fr endemic  Carachama (Spanish)  11.60 cm SL male/unsexed  Known from the upper Urubamba River basin (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus sericeus (Cope, 1872) Fr endemic  Carachama (Spanish)  5.00 cm SL male/unsexed  Known from the Ampiyacu River basin (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Ancistrus tamboensis Fowler, 1945 Fr endemic   8.20 cm SL male/unsexed  Known from Tambo River basin in the upper Ucayali drainage (Ref. 36713). Also Ref. 6868. 
Loricariidae Ancistrus variolus (Cope, 1872) Fr endemic  Carachama (Spanish)  4.80 cm SL male/unsexed  Known from Ampiyacu River basin (Ref. 36713). Also Ref. 6868.  No picture yet.
Cichlidae Andinoacara rivulatus (Günther, 1860) Fr native   20.00 cm TL male/unsexed  Known from the Tumbes River (Ref. 36377). 
Cichlidae Andinoacara stalsbergi Musilová, Schindler & Staeck, 2009 Fr endemic   11.30 cm SL male/unsexed ;10.30 cm SL female  Found in trans-andean rivers and lakes at the Pacific coast. Known from the Pacific slope of western Peru between Río Chira (Depto. Piura) in the north and the Río Pisco (Depto. Ica) in the south (Ref. 82770). 
Hemiodontidae Anodus elongatus Agassiz, 1829 Fr native  Julilla (Spanish)  30.30 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 38289. 
Anostomidae Anostomus anostomus (Linnaeus, 1758) Fr, Or native  Anostomus rayados (Spanish), Lisa (Spanish)  16.00 cm TL male/unsexed  Occurs in the Amazon River and its tributaries. Exported as an aquarium fish (Ref. 9235). Also Ref. 36801. 
Anostomidae Anostomus longus Géry, 1961 Fr native    Rcorded from Nucuray River, Peruvian Amazon, near its tributary to the Marañon River, vicinity of Concordia (Ref. 36801).  No picture yet.
Anostomidae Anostomus ucayalensis (Fowler, 1906) Fr native    Type locality: Río Ucayali or Peruvian Amazon.  No picture yet.
Loricariidae Aphanotorulus emarginatus (Valenciennes, 1840) Fr native  Carachama (Spanish)  33.60 cm TL male/unsexed  Amazon river (Ref. 6329). 
Loricariidae Aphanotorulus phrixosoma (Fowler, 1940) Fr native   10.10 cm SL male/unsexed  Type locality of Plecostomus phrixosoma, Ucayali River basin, Contamana (Ref. 129253).  No picture yet.
Loricariidae Aphanotorulus unicolor (Steindachner, 1908) Fr native   13.90 cm SL male/unsexed  Río Neshua, Río Aguaytia syst., ca. 8°36'S, 74°50'W, 60 km southwest of Pucallpa, Coronel Portillo Prov., (type locality of A. frankei) (Ref. 26282, 6868). 
Characidae Aphyocharax alburnus (Günther, 1869) Fr native   8.00 cm male/unsexed  Known from the Amazon River basin (Ref. 38382). 
Characidae Aphyocharax pusillus Günther, 1868 Fr native  Mojarita (Spanish)  6.35 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 38382.  No picture yet.
Rivulidae Aphyolebias manuensis Costa, 2003 Fr native    Type locality, Cocha Cashu, Parque Nacional Manu, Río Madre de Dios basin, ca. 12°10'S, 71°45'W, Depart. Madre de Dioa (Ref. 54621).  No picture yet.
Rivulidae Aphyolebias peruensis (Myers, 1954) Fr endemic   10.00 cm TL male/unsexed  Found in the Amazon River Basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Aphyolebias rubrocaudatus (Seegers, 1984) Fr endemic   6.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Rivulidae Aphyolebias schleseri Costa, 2003 Fr native    Type locality, ca. 1 km upriver from Tacshacuraray, ca. 3°50'S, 72°30'W, caño Lata, drainage of río Orosa, trib. of Amazon R, Depart Loreto (Ref. 54621). 
Rivulidae Aphyolebias wischmanni (Seegers, 1983) Fr endemic   13.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Achiridae Apionichthys finis (Eigenmann, 1912) Fr native  Lenguado (Spanish)  8.79 cm SL male/unsexed  Known from the Amazon basin (Ref. 49504). 
Achiridae Apionichthys nattereri (Steindachner, 1876) Fr native  Lenguado (Spanish)  23.40 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36798). 
Achiridae Apionichthys rosai Ramos, 2003 Fr native   3.45 cm SL male/unsexed  Known from the Amazon basin (Ref. 49504).  No picture yet.
Cichlidae Apistogramma agassizii (Steindachner, 1875) Fr native   4.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Cichlidae Apistogramma allpahuayo Römer, Beninde, Duponchelle, Díaz, Ortega, Hahn, Soares, Cachay, Dávila, Cornejo & Renno, 2012 Fr native   4.00 cm SL male/unsexed ;3.10 cm SL female  Known from Reserva Nacional Allpahuayo Mishana in Loreto. Found mainly in small rivers and streams west of the carretera (road) from Iquitos to Nauta and within the borders of the nature reserve (Ref. 91057). 
Cichlidae Apistogramma amoena (Cope, 1872) Fr native   6.30 cm TL male/unsexed ;6.00 cm female  Also Ref. 36377.  No picture yet.
Cichlidae Apistogramma atahualpa Römer, 1997 Fr endemic   4.20 cm SL male/unsexed  Known from the Amazon River basin in the Nanay River basin (Ref. 36377). 
Cichlidae Apistogramma baenschi Römer, Hahn, Römer, Soares & Wöhler, 2004 Fr native   5.27 cm SL male/unsexed  Known from a small tributary of the Rio Shanushi in the lower Rio Hualaga system, Departamento San Martin (Ref. 55840). 
Cichlidae Apistogramma barlowi Römer & Hahn, 2008 Fr native   6.37 cm SL male/unsexed  Found only around the Tierra típica northwest of Pebas in northern Peru (Ref. 75695). 
Cichlidae Apistogramma bitaeniata Pellegrin, 1936 Fr native   4.60 cm SL male/unsexed  Known from the Amazon River basin. Found in the lower Nanay, Mazán and Tigre (Ref. 36377). 
Cichlidae Apistogramma cacatuoides Hoedeman, 1951 Fr, Or native   5.00 cm SL male/unsexed   
Cichlidae Apistogramma cinilabra Römer, Duponchelle, Diaz, Davilla, Sirvas, Catchay & Renno, 2011 Fr native   5.37 cm SL male/unsexed  Found only in a small forest lake in the wider catchment of the Rio Itaya about 80 kilometres south of Iquitos, Departamento Loreto (Ref. 86747).  No picture yet.
Cichlidae Apistogramma cruzi Kullander, 1986 Fr native   5.10 cm SL male/unsexed  Known from the Amazon River basin in the Napo River drainage (Ref. 36377). 
Cichlidae Apistogramma eremnopyge Ready & Kullander, 2004 Fr native   3.44 cm SL male/unsexed ;2.82 cm SL female  Known from Rio Pintuyacu, a tributary of the Rio Itaya, close to Iquitos. Type locality Province Loreto, Río Itaya drainage, 28 km on road from Iquitos to Nauta, MUSM 21214 (2.82 cm SL, adult female) (Ref. 53325). 
Cichlidae Apistogramma eunotus Kullander, 1981 Fr native   5.30 cm SL male/unsexed  Known from the Amazon River basin, in the tributaries to the Ucayali and in the Yavarí River (Ref. 36377). 
Cichlidae Apistogramma feconat Römer, Soares, Dávila, Duponchelle, Renno & Hahn, 2015 Fr native   4.05 cm SL male/unsexed  Found only around the terra typica, the lower part of the Río Pucacuro northwest of Intuto in northern Peru. The entire area is protected as a national forest reserve (Zona Reservada Pucacuro) and is still covered by dense primary forest. Samplings have been carried out only on the left-hand side of the Rio Tigre. (Ref. 104987).  No picture yet.
Cichlidae Apistogramma huascar Römer, Pretor & Hahn, 2006 Fr native   4.50 cm SL male/unsexed ;4.13 cm SL female  Range of distritbution is still now known. Comes from northwestern Peru; imported specimens only come from the area southwest of Iquitós (Ref. 57916). 
Cichlidae Apistogramma luelingi Kullander, 1976 Fr native   3.30 cm SL male/unsexed ;2.87 cm SL female  Known from the Madre de Dios River basin of the Amazon River basin (Ref. 36377). 
Cichlidae Apistogramma martini Römer, Hahn, Römer, Soares & Wöhler, 2003 Fr native    Type locality, Small tributary of Rio Nanay, ca. 74°25'40"W, 3°31'10"S, near Alvarenga [formerly Puerto Alianza], Santa Maria Dist., Maynas Prov., Loreto Dept. (Ref. 50838).  No picture yet.
Cichlidae Apistogramma megastoma Römer, Römer, Estivals, Vela Díaz, Duponchelle, Dávila, Hahn & Renno, 2017 Fr native   7.63 cm SL male/unsexed ;6.19 cm SL female  Type locality of Apistogramma megastoma from small forest streams southwest of Leticia, probably draining to Rio Yavarí, Amazonas system; MUSM 52459 (Ref. 118051).  No picture yet.
Cichlidae Apistogramma nijsseni Kullander, 1979 Fr endemic   3.90 cm SL male/unsexed  Known from the Amazon River basin, in the Carahuayte River drainage, a tributary to the Ucayali River (Ref. 36377). 
Cichlidae Apistogramma norberti Staeck, 1991 Fr endemic   3.90 cm SL male/unsexed ;3.00 cm female  Known from the Amazon River basin, in the Tahuayo River basin (Ref. 36377). Type locality: Forest brook of the Quebrada Nuevo Horizonte, Río Tahuayo, ca. 73°05'W, 4°05'S, Dept. Loreto, Peru (Ref. 12965). Also Ref. 12251. 
Cichlidae Apistogramma ortegai Britzke, Oliveira & Kullander, 2014 Fr native   5.05 cm SL male/unsexed  Found only in a small stream (quebrada) tributary to the Ampyiacu River in the municipality of Pebas (Ref. 97388).  No picture yet.
Cichlidae Apistogramma panduro Römer, 1997 Fr endemic   4.90 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Cichlidae Apistogramma pantalone Römer, Römer, Soares & Hahn, 2006 Fr native   3.60 cm SL female  Type locality, small affluent of the Rio Nanay in Alvarenga (formerly Puerto Alianza), around 130 kilometers west of the city of Iquitos, Santa Maria district, Maynas Province (formerly Iquitos Province), Departamento Loreto (Ref. 57916). 
Cichlidae Apistogramma paulmuelleri Römer, Beninde, Duponchelle, Dávila, Díaz & Renno, 2013 Fr endemic  scarce (very unlikely) 4.13 cm SL male/unsexed  Known only from a small river of the Amazon River system in Loreto. Porgressive deforestation at the type locality and along the road from Iquitos to Náuta, as well as along main river channels in Amazonia Occidental, may put this endemic species of the District of Loreto at risk in the near future (Ref. 93321).  No picture yet.
Cichlidae Apistogramma rositae Römer, Römer & Hahn, 2006 Fr native   4.04 cm SL male/unsexed   
Cichlidae Apistogramma urteagai Kullander, 1986 Fr endemic   4.10 cm SL male/unsexed  Found in Madre de Dios River basin of the Amazon River basin (Ref. 36377). Known from close to Puerto Maldonado (Ref. 9088). 
Cichlidae Apistogramma wolli Römer, Soares, Dávila, Duponchelle, Renno & Hahn, 2015 Fr native   5.12 cm SL male/unsexed  Found only in the wider vicinity of Cabo Pontoja in northwestern Peru (Ref. 104987).  No picture yet.
Cichlidae Apistogrammoides pucallpaensis Meinken, 1965 Fr native   2.70 cm SL male/unsexed ;2.28 cm SL female  Known from the Amazon River basin (Ref. 36377). 
Trichomycteridae Apomatoceros alleni Eigenmann, 1922 Fr native   14.60 cm SL male/unsexed  Type locality: Rio Morona, Peruvian Amazon (Ref. 26282, 6868). Also Ref. 39970.  No picture yet.
Loricariidae Aposturisoma myriodon Isbrücker, Britski, Nijssen & Ortega, 1983 Fr native  Shitari (Spanish)  20.00 cm SL male/unsexed  Found in the upper Amazon River drainage, Aguaytia River basin (Ref. 36389). Type locality: Río Aguaytia basin, Río Huacamayo, ca. 9°S, 75°29'W, Dept. Ucayali, Prov. Coronel Portillo, Peru (Ref. 6868).  No picture yet.
Apteronotidae Apteronotus albifrons (Linnaeus, 1766) Fr native   50.00 cm TL male/unsexed  Amazon River. Also Ref. 1672. 
Apteronotidae Apteronotus bonapartii (Castelnau, 1855) Fr, Or native  Macana perro (Spanish), Macana (Spanish), Macana abteronotus (Spanish)  38.00 cm SL male/unsexed  Occurs in the Amazon River and its tributaries. Exported as an aquarium fish (Ref. 9235). 
Apteronotidae Apteronotus leptorhynchus (Ellis, 1912) Fr native   26.90 cm TL male/unsexed   
Apteronotidae Apteronotus macrolepis (Steindachner, 1881) Fr native   18.00 cm TL male/unsexed  Found in the Amazon River basin (Ref. 36886).  No picture yet.
Arapaimidae Arapaima gigas (Schinz, 1822) Fr, Aq, Rstr, Or native  Paiche (Spanish)  450 cm TL male/unsexed 170 SL Known from the Amazon River basin (Ref. 50891). Occurs mainly in Ucayali and Marañon Rivers, with the exception of Pacaya-Samiria (Ref. 9235). Minimum size of capture is 1 m. However, this restriction is hardly enforced (Ref. 557). 
Ariidae Ariopsis seemanni (Günther, 1864) Fr, Br, M native   44.40 cm TL male/unsexed   
Astroblepidae Astroblepus ardilai Ardila Rodríguez, 2012 Fr native   10.65 cm SL male/unsexed  Known from the upper basin of river Lebrija (Ref. 93747).  No picture yet.
Astroblepidae Astroblepus cajamarcaensis Ardila Rodríguez, 2013 Fr native   5.78 cm SL male/unsexed  Type locality of Astroblepus cajamarcaensis, Dept. de Cajamarca. Caserío Toldopata, río Grande, elevation 3282 meters. Known only from this locality (Ref. 126791).  No picture yet.
Astroblepidae Astroblepus chinchaoensis Ardila Rodríguez, 2014 Fr native   5.30 cm SL male/unsexed  Type locality of Astroblepus chinchaoensis, Dept. of Huánuco, Huánuco Prov., District of Chinchao, Quebrada Saria (Ref. 123283).  No picture yet.
Astroblepidae Astroblepus chotae (Regan, 1904) Fr native   10.00 cm TL male/unsexed   
Astroblepidae Astroblepus floridaensis Ardila Rodríguez, 2013 Fr native   4.61 cm SL male/unsexed ;5.78 cm SL female  Type locality of Astroblepus floridaensis, Dept. del Amazonas, Bongará, Jazan, Pedro Ruíz, CCA del río Utcubamba, río Tingo, tributario del río Utcubamba. río a la Florida (Quebrada Florida), a 500 m de la confluencia con el río Utcubamba. Known only from this locality (Ref. 126791).  No picture yet.
Astroblepidae Astroblepus formosus Fowler, 1945 Fr native  Bagre (Spanish)  5.00 cm SL male/unsexed  Found in high-altitude systems of lakes and rivers (Ref. 6329). Type locality: Río Ucayali basin, near Tarma, Acobamba, Peru, elev. 2900 m (Ref. 26282).  No picture yet.
Astroblepidae Astroblepus hidalgoi Ardila Rodríguez, 2013 Fr native   4.64 cm SL male/unsexed  Type locality of Astroblepus hidalgoi, Dept. del Amazonas, Bongará, Jazan, Pedro Ruíz, CCA del río Utcubamba, río Tingo, tributario del río Utcubamba. Known only from this locality (Ref. 126791).  No picture yet.
Astroblepidae Astroblepus huallagaensis Ardila Rodríguez, 2013 Fr native   5.39 cm SL male/unsexed  Type locality of Astroblepus huallagaensis, Departamento de Huánuco, Chinchao, CCA, río Huallaga, elevation 997 m. Known only from this locality (Ref. 126791).  No picture yet.
Astroblepidae Astroblepus labialis Pearson, 1937 Fr native   7.00 cm SL male/unsexed  Found in Marañon river. 
Astroblepidae Astroblepus longiceps Pearson, 1924 Fr native   6.00 cm SL male/unsexed  Known from the Madeira River basin (Ref. 37058). Found in Rio Yanahuana (Ref. 6868).  No picture yet.
Astroblepidae Astroblepus longifilis (Steindachner, 1882) Fr native   7.00 cm SL male/unsexed  Known from the upper Huallaga River basin (Ref. 37058). Found in the Rio Huambo and Rio Totora near Chirimoto. 
Astroblepidae Astroblepus mancoi Eigenmann, 1928 Fr native   10.20 cm TL male/unsexed  Found in the upper Ucayali River basin (Ref. 37058). Recorded from the Rio Comberciato, Urubamba (Ref. 6868). 
Astroblepidae Astroblepus moyanensis Ardila Rodríguez, 2014 Fr native   7.26 cm SL male/unsexed  Type locality of Astroblepus moyanensis, Dept. of Cajamarca, Cajabamba, District of Cachachi, Rio Condebamba, quebrada Moyán, 400 m from Cacerio Moyán Alto (Ref. 123283).  No picture yet.
Astroblepidae Astroblepus ortegai Ardila Rodríguez, 2012 Fr native   9.28 cm SL male/unsexed  Known from río Cañaris, Departamento de Cajamarca (Ref. 93748).  No picture yet.
Astroblepidae Astroblepus peruanus (Steindachner, 1876) Fr native   6.00 cm SL male/unsexed  Found in Amable Maria (Ref. 6868). Known from the upper Ucayali River basin (Ref. 37058).  No picture yet.
Astroblepidae Astroblepus praeliorum Allen, 1942 Fr native   8.00 cm SL male/unsexed  Known from the upper Marañon River basin (Ref. 37058). Found in Tarma, Palca, Huancayo, Oroya and Huancachupa Creek (Ref. 6868). 
Astroblepidae Astroblepus quispei Ardila Rodríguez, 2012 Fr native   4.80 cm SL male/unsexed  Known from río Huallaga in Departamento de Huánuco (Ref. 93748).  No picture yet.
Astroblepidae Astroblepus riberae Cardona & Guerao, 1994 Fr native   9.00 cm SL male/unsexed  Found in the Reque River basin and Pacific coastal drainage (Ref. 37058).  No picture yet.
Astroblepidae Astroblepus rosei Eigenmann, 1922 Fr native   10.00 cm SL male/unsexed  Known from the Pacific coastal drainages of Cajamarca (Ref. 37058). Found in Rio Jequetepeque, Llallan (Ref. 6868).  No picture yet.
Astroblepidae Astroblepus sabalo (Valenciennes, 1840) Fr native    Knonw from the upper Ucayali River basin (Ref. 37058). Type locality: Río Apurimac, north of Cusco, Peru (Ref. 37058). 
Astroblepidae Astroblepus simonsii (Regan, 1904) Fr native   8.00 cm SL male/unsexed  Known from the Santa River basin and Pacific coastal drainages (Ref. 37058). Found in Huaras (Ref. 6868).  No picture yet.
Astroblepidae Astroblepus stuebeli (Wandolleck, 1916) Fr native   8.00 cm SL male/unsexed  Known from the Lake Titicaca basin (Ref. 37058).  No picture yet.
Astroblepidae Astroblepus supramollis Pearson, 1937 Fr native   8.00 cm SL male/unsexed  Found in Balsas (Ref. 6868). Known from the Marañon River basin (Ref. 37058).  No picture yet.
Astroblepidae Astroblepus taczanowskii (Boulenger, 1890) Fr native   8.00 cm SL male/unsexed  Found in Amable Maria, Andes (Ref. 96868). Known from the upper Ucayali River basin (Ref. 37058).  No picture yet.
Astroblepidae Astroblepus tamboensis Ardila Rodríguez, 2014 Fr native   3.98 cm SL male/unsexed  Type locality of Astroblepus tamboensis, Dept. Huánuco, Huánuco, Chaglia, rio Tambo (Ref. 123283).  No picture yet.
Astroblepidae Astroblepus vanceae (Eigenmann, 1913) Fr native   8.00 cm SL male/unsexed  Found in Tarma (Ref. 6868). Known from the upper Ucayali River basin (Ref. 37058).  No picture yet.
Cichlidae Astronotus crassipinnis (Heckel, 1840) Fr native   24.00 cm SL male/unsexed  Known from the Madre de Dios River drainage of the Amazon River basin (Ref. 36377). 
Cichlidae Astronotus ocellatus (Agassiz, 1831) Fr native  Acarahuazú (Spanish), Carahuazú (Spanish)  45.70 cm TL male/unsexed  Known from the Ucayali (Iparia, Yarina, Cocha, Contamana, Supay system), Amazonas (near Iquitos, Pebas), Solimoes (lower River Tefe; Codajas) and Ica (Cuiba). Also Ref. 1739, 36377. 
Characidae Astyanax abramis (Jenyns, 1842) Fr native  Mojara (Spanish)  14.00 cm SL male/unsexed   
Characidae Astyanax bimaculatus (Linnaeus, 1758) Fr native   17.50 cm TL male/unsexed   
Characidae Astyanax boliviensis Ruiz-C., Román-Valencia, Taphorn, Buckup & Ortega, 2018 Fr native   8.95 cm SL male/unsexed  Collected from Puno, Sandia province, Tavara River 2 km from the mouth of Quebrada Grande, Zona Reservada, Tambopata-Candamo (Ref. 119406). 
Characidae Astyanax gandhiae Ruiz-C., Román-Valencia, Taphorn, Buckup & Ortega, 2018 Fr native   10.96 cm male/unsexed  Type locality of Astyanax gandhiae, Department of Amazonas, Condorcanqui Province, Marañon River Basin, upper Cenepa River drainage (Ref. 119406). 
Characidae Astyanax kennedyi Géry, 1964 Fr native  Mojara (Spanish)   Known from the Amazon River. 
Characidae Astyanax longior (Cope, 1878) Fr native  Mojara (Spanish)   Known from the Amazon River. Also Ref. 598.  No picture yet.
Characidae Astyanax maximus (Steindachner, 1876) Fr native  Mojara (Spanish)  25.00 cm TL male/unsexed  Known from the Amazon basin. 
Characidae Astyanax villwocki Zarske & Géry, 1999 Fr native   11.40 cm SL male/unsexed  Recorded from the Rio Ucayali system. 
Characidae Attonitus bounites Vari & Ortega, 2000 Fr native   5.67 cm SL male/unsexed  Type locality: Departamento de Puno, Provincia Carabaya, Zona Reservada Tambopata Candamo, Río Candamo (13°24’S 70°01’W).  No picture yet.
Characidae Attonitus ephimeros Vari & Ortega, 2000 Fr native   4.97 cm SL male/unsexed  Found in the Aguaytia and Pachitea rivers in the Ucayali River basin (Ref. 38376). Type locality: Departamento de Cusco, Provincia La Convencion, Río Urubamba basin, Río Picha, Puerto Huallana, Quebrada Mapichiriato (11°50’S 73°20’W).  No picture yet.
Characidae Attonitus irisae Vari & Ortega, 2000 Fr native   4.62 cm SL male/unsexed  Found in the Aguaytia and Pachitea rivers in the Ucayali River basin (Ref. 38376). Type locality: Peru, Departamento de Huanuco, Provincia Pachitea, mouth of Río Huambo, where it empties into Río Pachitea (approximately 9°39’S 74°56’W).  No picture yet.
Auchenipteridae Auchenipterichthys coracoideus (Eigenmann & Allen, 1942) Fr native   19.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37098). 
Auchenipteridae Auchenipterichthys thoracatus (Kner, 1858) Fr native  Bagre (Spanish)  13.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37098). 
Auchenipteridae Auchenipterus ambyiacus Fowler, 1915 Fr native  Mararate (Spanish)  24.40 cm SL male/unsexed   
Auchenipteridae Auchenipterus brachyurus (Cope, 1878) Fr native  Mararate (Spanish)  16.50 cm SL male/unsexed  Known from the Amazon River (Ref. 6329, 37098).  No picture yet.
Gobiidae Awaous banana (Valenciennes, 1837) Fr native   30.00 cm SL male/unsexed ;24.38 cm SL female  Found in Tumbes. 
Characidae Axelrodia stigmatias (Fowler, 1913) Fr native  Mojarita (Spanish)  2.49 cm SL male/unsexed  Known from the upper Amazon River (Ref. 38376). 
Characidae Bario steindachneri (Eigenmann, 1893) Fr native  Mojara (Spanish)  9.00 cm SL male/unsexed  Found in the Amazon River basin (Ref. 38376). Also Ref. 38376.  No picture yet.
Atherinopsidae Basilichthys archaeus (Cope, 1878) Fr native   11.61 cm SL male/unsexed  Type locality: At Arequipa, Pacific slope, Peru, elev. 7500 ft. Also Ref. 33128. 
Atherinopsidae Basilichthys semotilus (Cope, 1874) Fr native    Known from Callao.  No picture yet.
Batrachoididae Batrachoides pacifici (Günther, 1861) Fr, Br, M native   43.00 cm TL male/unsexed   
Pseudopimelodidae Batrochoglanis raninus (Valenciennes, 1840) Fr native   20.00 cm SL male/unsexed   
Cichlidae Biotodoma cupido (Heckel, 1840) Fr, Or native  Ciclido cupido (Spanish), Bujurqui (Spanish)  11.70 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). Occurs in Ucayali and Marañón Rivers, mainly in adjoining lagoons. Exported as an aquarium fish (Ref. 9235). 
Ctenoluciidae Boulengerella cuvieri (Spix & Agassiz, 1829) Fr native   88.00 cm FL male/unsexed  Known from Loreto (Rio Nanay, Rio Putomayo and Rio Napo basin). 
Ctenoluciidae Boulengerella maculata (Valenciennes, 1850) Fr, Or native  Gazza-challua (Spanish), Lápiz challua (Spanish), Per lápiz (Spanish), Pez lápiz moteado (Spanish), Picudo (Spanish)  31.90 cm SL male/unsexed  Occurs in Ucayali and Marañon Rivers and adjoining lagoons. Found in Peruvian Amazon, and Loreto (Rio Ambyiacu, Rio Nanay, Rio Samiria and Rio Samiria drainage, Rio Tahuaya basin, Rio Yavari basin, Rio Napo system, and small stream near Genero Herrera). Exported as an aqurarium fish (Ref. 9235). 
Characidae Brachychalcinus copei (Steindachner, 1882) Fr native  Mojara (Spanish)  9.00 cm TL male/unsexed  Known from the Amazon River. 
Characidae Brachychalcinus nummus Böhlke, 1958 Fr native  Mojara (Spanish)  8.40 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 36891.  No picture yet.
Hypopomidae Brachyhypopomus arrayae Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Macana (Spanish)  16.00 cm TL male/unsexed ;13.30 cm TL female  Known from the upper Madeira River basin; most records from río Madre de Dios (Ref. 116763).  No picture yet.
Hypopomidae Brachyhypopomus beebei (Schultz, 1944) Fr native   32.00 cm SL male/unsexed   
Hypopomidae Brachyhypopomus benjamini Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Macana (Spanish)  13.50 cm TL male/unsexed ;11.90 cm TL female  Known from forest stream tributaries of the lower río Ucayali and forest stream tributaries of the río Nanay, near Iquitos, Loreto (Ref. 116763).  No picture yet.
Hypopomidae Brachyhypopomus bennetti Sullivan, Zuanon & Cox Fernandes, 2013 Fr native   23.20 cm TL male/unsexed  Known from the Río Ucayali drainage in Loreto (Ref. 94132). 
Hypopomidae Brachyhypopomus brevirostris (Steindachner, 1868) Fr native   34.70 cm TL male/unsexed  Amazon river.  No picture yet.
Hypopomidae Brachyhypopomus flavipomus Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Macana (Spanish)  11.70 cm TL female  Known from the Amazon River basin (Ref. 116763).  No picture yet.
Hypopomidae Brachyhypopomus hamiltoni Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Macana (Spanish)  12.50 cm TL male/unsexed ;9.70 cm TL female  Known from the Amazon River (Ref. 116763).  No picture yet.
Hypopomidae Brachyhypopomus pinnicaudatus (Hopkins, 1991) Fr native   18.60 cm TL male/unsexed   
Hypopomidae Brachyhypopomus regani Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Macana (Spanish)  15.60 cm TL male/unsexed ;14.10 cm TL female  Known from the Amazon and Marañón River drainages (Ref. 116763).  No picture yet.
Hypopomidae Brachyhypopomus sullivani Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native   15.20 cm TL male/unsexed ;12.70 cm TL female    No picture yet.
Hypopomidae Brachyhypopomus verdii Crampton, de Santana, Waddell & Lovejoy, 2017 Fr native  Macana (Spanish)  12.00 cm TL male/unsexed ;11.20 cm TL female  Found only in the tributaries of the río Marañón and río Ucayali in the upper Amazon basin (Ref. 116763).  No picture yet.
Pimelodidae Brachyplatystoma capapretum Lundberg & Akama, 2005 Fr native   58.10 cm SL male/unsexed   
Pimelodidae Brachyplatystoma filamentosum (Lichtenstein, 1819) Fr native   360 cm TL male/unsexed  In the tributaries of the Amazon (Ref. 6329). 
Pimelodidae Brachyplatystoma juruense (Boulenger, 1898) Fr, Or native  Zúngaro (Spanish), Bagre listado (Spanish), Zúngaro alianza (Spanish)  60.00 cm TL male/unsexed  Occurs in Ucayali, Marañon, and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Pimelodidae Brachyplatystoma platynema Boulenger, 1898 Fr native   100.00 cm SL male/unsexed   
Pimelodidae Brachyplatystoma rousseauxii (Castelnau, 1855) Fr native  Dorado (Spanish), Zúngaro dorado (Spanish)  192 cm TL male/unsexed   
Pimelodidae Brachyplatystoma tigrinum (Britski, 1981) Fr native   60.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36506). 
Pimelodidae Brachyplatystoma vaillantii (Valenciennes, 1840) Fr native   150 cm TL male/unsexed   
Heptapteridae Brachyrhamdia marthae Sands & Black, 1985 Fr native   7.60 cm SL male/unsexed  Type locality (Ref. 6868, 26282).  No picture yet.
Bryconidae Brycon atrocaudatus (Kner, 1863) Fr native  Cascafe (Spanish)  27.30 cm SL male/unsexed  Occurs in Trans-Andean river basins (Ref. 38504). 
Bryconidae Brycon cephalus (Günther, 1869) Fr native  Sábalo cola roja (Spanish), Sábalo (Spanish)  45.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 6329, 38504). 
Bryconidae Brycon falcatus Müller & Troschel, 1844 Fr native  Sábalo (Spanish)  48.90 cm SL male/unsexed ;49.50 cm SL female   
Bryconidae Brycon melanopterus (Cope, 1872) Fr native  Sábalo cola negra (Spanish)  38.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38504). 
Bryconidae Brycon pesu Müller & Troschel, 1845 Fr native  Sabalito (Spanish)  18.90 cm SL male/unsexed  Also Ref. 38504. 
Bryconidae Brycon stolzmanni Steindachner, 1879 Fr native  Sábalo (Spanish)  20.60 cm SL male/unsexed  Found in the upper Marañon River basin (Ref. 38504). 
Characidae Bryconacidnus ellisae (Pearson, 1924) Fr native  Mojarita (Spanish)  3.80 cm SL male/unsexed  Known from the Amazon River. 
Characidae Bryconacidnus paipayensis (Pearson, 1929) Fr native  Mojarita (Spanish)  5.00 cm SL male/unsexed  Known from the Amazon River.  No picture yet.
Characidae Bryconamericus alfredae Eigenmann, 1927 Fr native  Mojarita (Spanish)  6.60 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Characidae Bryconamericus brevirostris (Günther, 1860) Fr native   9.50 cm TL male/unsexed   
Characidae Bryconamericus diaphanus (Cope, 1878) Fr native   13.00 cm TL male/unsexed  Known from the Amazon River. 
Characidae Bryconamericus grosvenori Eigenmann, 1927 Fr native  Mojarita (Spanish)  7.00 cm TL male/unsexed  Known from the Amazon River. Also Ref. 598.  No picture yet.
Characidae Bryconamericus osgoodi Eigenmann & Allen, 1942 Fr native  Mojarita (Spanish)  6.10 cm SL male/unsexed  Known from the Amazon River. Also Ref. 598. 
Characidae Bryconamericus pachacuti Eigenmann, 1927 Fr native  Mojarita (Spanish)  7.50 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Characidae Bryconamericus pectinatus Vari & Siebert, 1990 Fr native   8.00 cm TL male/unsexed    No picture yet.
Characidae Bryconamericus peruanus (Müller & Troschel, 1845) Fr native  Carachita (Spanish)  9.20 cm SL male/unsexed  Type locality: near Lima (38376). Also Ref. 598. 
Characidae Bryconamericus phoenicopterus (Cope, 1872) Fr native  Mojarita (Spanish)  6.00 cm TL male/unsexed  Known from the Amazon River. Also Ref. 598.  No picture yet.
Characidae Bryconamericus simus (Boulenger, 1898) Fr native  Mojarita (Spanish)  8.70 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Characidae Bryconamericus thomasi Fowler, 1940 Fr native  Mojarita (Spanish)  7.00 cm SL male/unsexed  Known from the Amazon River.  No picture yet.
Characidae Bryconella pallidifrons (Fowler, 1946) Fr native  Mojarrita (Spanish)  2.32 cm SL male/unsexed  Known from the Amazon River. 
Iguanodectidae Bryconops affinis (Günther, 1864) Fr native  Denton (Spanish)  12.00 cm TL male/unsexed  Known from the Amazon River. 
Cichlidae Bujurquina apoparuana Kullander, 1986 Fr endemic   7.70 cm SL male/unsexed  Known from streams between Pucallpa and Tournavista, and lower reaches of the left bank Ucayali tributaries Shahuaya and Amaquiria (Ref. 9088). 
Cichlidae Bujurquina cordemadi Kullander, 1986 Fr native   6.20 cm SL male/unsexed  Known from two localities near Puerto Maldonado, both in tributaries to the R. Madre de Dios.  No picture yet.
Cichlidae Bujurquina eurhinus Kullander, 1986 Fr endemic   8.90 cm SL male/unsexed  Known from the Amazon River basin, in the Madre de Dios drainage (Pilcopata, upper Madre de Dios, Manú, Colorado and Marcapata rivers) (Ref. 36377). 
Cichlidae Bujurquina hophrys Kullander, 1986 Fr endemic   8.50 cm SL male/unsexed  Known from the Amazon River basin, in the Pachitea and Aguaytía River basins (Ref. 36377).  No picture yet.
Cichlidae Bujurquina huallagae Kullander, 1986 Fr endemic   8.30 cm SL male/unsexed  Known from the Amazon River basin, in the Huallaga River basin at Tarapoto and Tingo María (Ref. 36377). 
Cichlidae Bujurquina labiosa Kullander, 1986 Fr endemic   5.50 cm SL male/unsexed  Known from the upper River Ucayali (near Chinipo River), Amazon River basin (Ref. 36377).  No picture yet.
Cichlidae Bujurquina megalospilus Kullander, 1986 Fr endemic   7.10 cm SL male/unsexed ;7.07 cm SL female  Known from the Amazon River basin, in the Pachitea and Aguaytía River basins (Ref. 36377). Found in Tournavista and R. Neshuya (Ref. 9088).  No picture yet.
Cichlidae Bujurquina moriorum Kullander, 1986 Fr endemic   9.70 cm SL male/unsexed  Known from the Amazon River basin, in the Carahuayte, Mazám and lower Napo River basins (Ref. 36377). 
Cichlidae Bujurquina omagua Rican & Ricanova, 2023 Fr native   9.89 cm SL male/unsexed  Type locality of Bujurquina omagua: Amazon River basin, Loreto, Maynas Province, District Las Amazonas, close to Oran village, Quebrada Sabalillo, cabeceras upper locality P18-17 (Ref. 128854).  No picture yet.
Cichlidae Bujurquina ortegai Kullander, 1986 Fr native   11.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377) in the Mayo river near Moyobamba and Rioja (Ref. 9088).  No picture yet.
Cichlidae Bujurquina peregrinabunda Kullander, 1986 Fr native   10.70 cm SL male/unsexed  Known from the Amazon River basin in the lower Ampiyacu River basin (Ref. 36377). 
Cichlidae Bujurquina robusta Kullander, 1986 Fr native   8.80 cm SL male/unsexed  Known from the Amazon River basin, in the Chinipo River basin (upper Ucayali River drainage) (Ref. 36377).  No picture yet.
Cichlidae Bujurquina syspilus (Cope, 1872) Fr endemic   10.30 cm SL male/unsexed  Found in the Amazon River basin (Ref. 36377), from the lower Ucayali, lower Napo, lower Ampiyacu and lower Yavari (Ref. 9088). 
Cichlidae Bujurquina tambopatae Kullander, 1986 Fr endemic   8.20 cm SL male/unsexed  Known from Tambopata River basin (Madre de Dios River drainage) of the Amazon River basin (Ref. 36377).  No picture yet.
Aspredinidae Bunocephalus aleuropsis Cope, 1870 Fr native   9.10 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695).  No picture yet.
Aspredinidae Bunocephalus coracoideus (Cope, 1874) Fr, Or native  Sapo cunshi (Spanish), Banjo cat (English)  11.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). Exported as an aquarium fish (Ref. 9235). Also Ref. 6868. 
Aspredinidae Bunocephalus knerii Steindachner, 1882 Fr native   13.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695).  No picture yet.
Aspredinidae Bunocephalus verrucosus (Walbaum, 1792) Fr native   9.84 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Chilodontidae Caenotropus labyrinthicus (Kner, 1858) Fr native   14.80 cm SL male/unsexed ;25.30 cm SL female  Known from the Amazon River (Ref. 37477). 
Callichthyidae Callichthys callichthys (Linnaeus, 1758) Fr native   21.00 cm TL male/unsexed   
Pimelodidae Calophysus macropterus (Lichtenstein, 1819) Fr, Or native  Mota (Spanish), Bagre (Spanish), Mota moteada (Spanish), Callophysus catfish (English)  40.00 cm TL male/unsexed  Occurs in Ucayali, Marañon, Pacaya, Samiria and Huallaga Rivers. Exported as an aquarium fish (Ref. 9235). 
Cyprinidae Carassius auratus (Linnaeus, 1758) Fr introduced   48.00 cm TL male/unsexed   
Carcharhinidae Carcharhinus leucas (Valenciennes, 1839) Fr, Br, M native  Cazón (Spanish), Tiburón (Spanish), Tiburón ñato (Spanish)  360 cm TL male/unsexed ;400 cm TL female  Found in Amazon and Ucayali Rivers (Ref. 79732). Also recorded from Paita (Ref. 96339). Also Ref. 244. 
Gasteropelecidae Carnegiella myersi Fernández-Yépez, 1950 Fr native  Pechito (Spanish)  2.15 cm SL male/unsexed  Recorded from the Amazon. 
Gasteropelecidae Carnegiella schereri Fernández-Yépez, 1950 Fr native  Pechito (Spanish)  2.60 cm SL male/unsexed  Known from the Amazon River (Ref. 39056). 
Gasteropelecidae Carnegiella strigata (Günther, 1864) Fr, Or native  Pechito jaspeado (Spanish), Pechito (Spanish), Strigata (Spanish)  3.49 cm SL male/unsexed  Occurs in tributaries of the Amazon system and vicinity of Iquitos; also in the Napo and Mazán Rivers. Exported as an aquarium fish (Ref. 9235). Also Ref. 39056. 
Ariidae Cathorops tuyra (Meek & Hildebrand, 1923) Fr, Br, M native   33.90 cm TL male/unsexed   
Doradidae Centrodoras brachiatus (Cope, 1872) Fr native  Bagre (Spanish)  41.00 cm TL male/unsexed  Known from the Amazon River (Ref. 37054). 
Auchenipteridae Centromochlus existimatus Mees, 1974 Fr native  Pirillo (Spanish)  9.02 cm SL male/unsexed  Known from Contamana, rio Ucayali basin; rio Amazonas, Iquitos; and rio Ucayali, Pucallpa (Ref. 39641). Also Ref. 37098. 
Auchenipteridae Centromochlus heckelii (De Filippi, 1853) Fr native  Pirillo (Spanish)  13.90 cm SL male/unsexed  Found in the Rio Napo (Ref. 6868). 
Centropomidae Centropomus nigrescens Günther, 1864 Fr, Br, M native  Róbalo (Spanish)  123 cm TL male/unsexed   
Characidae Ceratobranchia binghami Eigenmann, 1927 Fr native  Mojarita (Spanish)  6.20 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Characidae Ceratobranchia delotaenia Chernoff & Machado-Allison, 1990 Fr native   3.79 cm SL male/unsexed  Found in the Amazon River basin (Ref. 38376).  No picture yet.
Characidae Ceratobranchia obtusirostris Eigenmann, 1914 Fr native  Mojarita (Spanish)  5.50 cm SL male/unsexed  Known from the Amazon River. Also Ref. 598. 
Cetopsidae Cetopsis candiru Spix & Agassiz, 1829 Fr native  Canero (Spanish)  26.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36486). 
Cetopsidae Cetopsis coecutiens (Lichtenstein, 1819) Fr native   27.30 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36486). 
Cetopsidae Cetopsis montana Vari, Ferraris & de Pinna, 2005 Fr native   11.90 cm SL male/unsexed   
Cetopsidae Cetopsis oliveirai (Lundberg & Rapp Py-Daniel, 1994) Fr native   3.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36486). 
Cetopsidae Cetopsis parma Oliveira, Vari & Ferraris, 2001 Fr native   17.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36486). 
Cetopsidae Cetopsis pearsoni Vari, Ferraris & de Pinna, 2005 Fr native   11.40 cm SL male/unsexed    No picture yet.
Cetopsidae Cetopsis plumbea Steindachner, 1882 Fr native  Canero (Spanish)  11.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36486). 
Heptapteridae Cetopsorhamdia filamentosa Fowler, 1945 Fr endemic   2.90 cm TL male/unsexed  Known from Tulumayo River basin in upper Ucayali River drainage (Ref. 36914). Type locality, San Ramón, Vallé de Chanchamayo, at 800 m elevation (Ref. 36914).  No picture yet.
Cichlidae Chaetobranchus flavescens Heckel, 1840 Fr native  Bujurqui vaso (Spanish), Bujurqui (Spanish)  21.00 cm SL male/unsexed ;26.00 cm TL female  Known from the Ucayali-Amazonas from Yarina Cocha to Leticia and from the Yaquerana near Colonia Angamos. Also Ref. 6329, 36377. 
Loricariidae Chaetostoma bifurcum Lujan, Meza-Vargas, Astudillo-Clavijo, Barriga-Salazar & López-Fernández, 2015 Fr native   14.01 cm SL male/unsexed  Known from Tumbes river drainage in northwestern Peru (Ref. 104727).  No picture yet.
Loricariidae Chaetostoma branickii Steindachner, 1881 Fr endemic   13.19 cm SL male/unsexed  Known from the upper Chamaya River basin in the upper Marañon River drainage (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Chaetostoma changae Salcedo, 2006 Fr native   7.61 cm SL male/unsexed  known only from the upper Río Huallaga basin at Tingo María (650 m elevation), Departamento de Huánuco. Type locality, vicinity of Tingo Maria, back-water near Puerto Nuevo, flowing into Rio Tullamayo, ANSP 179125 (holotype, male 6.37 cm SL) (Ref. 56969).  No picture yet.
Loricariidae Chaetostoma daidalmatos Salcedo, 2006 Fr native    Known from the Huallaga River in central Peru (Ref. 57692).  No picture yet.
Loricariidae Chaetostoma lineopunctatum Eigenmann & Allen, 1942 Fr endemic  Carachama (Spanish)  14.30 cm SL male/unsexed  Known from Aguaytia, Pachitea and Pisqui River basins in the Ucayali River drainage (Ref. 36713). Also Ref. 6868. 
Loricariidae Chaetostoma loborhynchos Tschudi, 1846 Fr endemic   14.18 cm SL male/unsexed  Known from Tambo River basin in the Ucayali River drainage (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Chaetostoma marmorescens Eigenmann & Allen, 1942 Fr endemic   13.50 cm SL male/unsexed  Known from the upper Huallaga River basin in Marañon River drainage (Ref. 36713). Also Ref. 6868. 
Loricariidae Chaetostoma mollinasum Pearson, 1937 Fr endemic  Carachama (Spanish)  6.80 cm SL male/unsexed  Known from Marañon and Cajamarca River basins (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Chaetostoma spondylus Salcedo & Ortega, 2015 Fr native   13.09 cm SL male/unsexed  Known from Río Chotano, río Huancabamba, río Sendamal, and río Utcubamba, mountain tributaries (1500- 2000 m above sea level) of río Marañón, Amazon River basin (Ref. 103265). 
Loricariidae Chaetostoma stroumpoulos Salcedo, 2006 Fr native    Known from the Huallaga River in central Peru (Ref. 57692).  No picture yet.
Loricariidae Chaetostoma taczanowskii Steindachner, 1882 Fr endemic  Carachama (Spanish)  17.00 cm TL male/unsexed  Known from Huallaga and Urubamba River basins (Ref. 36713). 
Loricariidae Chaetostoma trimaculineum Lujan, Meza-Vargas, Astudillo-Clavijo, Barriga-Salazar & López-Fernández, 2015 Fr native   16.00 cm SL male/unsexed    No picture yet.
Chalceidae Chalceus erythrurus (Cope, 1870) Fr, Or native  Sardina (Spanish), Huacamayo challua (Spanish), San Pedro (Spanish), Tucan fish (English)  24.50 cm SL male/unsexed  Occurs in Pacaya and Samiria Rivers and adjoining lagoons. Exported as an aquarium fish (Ref. 9235). Also Ref. 9235, 38376. 
Chalceidae Chalceus guaporensis Zanata & Toledo-Piza, 2004 Fr native   17.40 cm SL male/unsexed  Known from Rio Madre de Dios (Ref. 55827). 
Crenuchidae Characidium etheostoma Cope, 1872 Fr native  Mojarita (Spanish)  4.15 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 37059  No picture yet.
Crenuchidae Characidium steindachneri Cope, 1878 Fr native  Mojarita (Spanish)  4.12 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 37059. 
Characidae Charax caudimaculatus Lucena, 1987 Fr native   9.70 cm SL male/unsexed  Known from the Madeira River basin (Ref. 36811). Recorded from Parque Nacional Manu, Madre de Dios (Ref. 26633).  No picture yet.
Characidae Charax tectifer (Cope, 1870) Fr native  Denton (Spanish)  14.40 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 36811). Type locality, Pebas (Ref. 36656).  No picture yet.
Heptapteridae Chasmocranus peruanus Eigenmann & Pearson, 1942 Fr endemic  Bagre (Spanish)  5.20 cm SL male/unsexed  Found in the Amazon basin. Recorded from Puerto Melendez below Pongo de Manseriche (Ref. 6868). Also Ref. 36914.  No picture yet.
Heptapteridae Chasmocranus quadrizonatus Pearson, 1937 Fr endemic  Bagre (Spanish)  6.30 cm TL male/unsexed  Found in the Amazon basin (Ref. 6329). Recorded from Tingo de Pauca, Pusic, upper Marañon (Ref. 6868). Also Ref. 36914. 
Pimelodidae Cheirocerus eques Eigenmann, 1917 Fr native    Known from the Amazon River basin (Ref. 36506).  No picture yet.
Pimelodidae Cheirocerus goeldii (Steindachner, 1908) Fr native   15.20 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329).  No picture yet.
Characidae Cheirodon luelingi Géry, 1964 Fr native   1.76 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 48602).  No picture yet.
Characidae Cheirodon ortegai Vari & Géry, 1980 Fr native   3.43 cm SL male/unsexed  Found in the Ucayali River basin (Ref. 48602). Type locality, Woodland pool along Río Ucayali at Cocha Lobo, 5 km downriver from Masisea, Prov. Coronel Portillo, Dept. Loreto (Ref. 46206).  No picture yet.
Bryconidae Chilobrycon deuterodon Géry & de Rham, 1981 Fr native   10.80 cm SL male/unsexed  Occurs in Tumbes River, Pacific slope of northern Peru (Ref. 38504).  No picture yet.
Chilodontidae Chilodus fritillus Vari & Ortega, 1997 Fr native   7.30 cm SL male/unsexed  Recorded fromMadre de Dios, Provincia Tambopata, Sanctuario Nacional Pampas del Heath, Rio Palma Real, oxbow lagoon near Puesto de Control Enahuipa (Ref. 26082). Also Ref. 37477.  No picture yet.
Chilodontidae Chilodus punctatus Müller & Troschel, 1844 Fr, Or native  Mojara (Spanish)  18.00 cm TL male/unsexed  Occurs in the Amazon River (Ref. 26082). Exported as an aquarium fish (Ref. 9235). Also Ref. 37477. 
Ariidae Chinchaysuyoa ortegai Marceniuk, Marchena, Oliveira & Betancur-R., 2019 Fr native   30.00 cm SL male/unsexed  Type locality of the holotype of Chinchaysuyoa ortegai: reservoir Poechos, middle Rio Chira, Catamayo basin (Ref. 119759).  No picture yet.
Characidae Chrysobrycon eliasi Vanegas-Ríos, Azpelicueta & Ortega, 2011 Fr native   3.99 cm SL male/unsexed ;4.35 cm female    No picture yet.
Characidae Chrysobrycon hesperus (Böhlke, 1958) Fr native  Mojara (Spanish)  8.18 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Recorded in Napo River basin (Ref. 38597).  No picture yet.
Characidae Chrysobrycon myersi (Weitzman & Thomerson, 1970) Fr native  Mojara (Spanish)  6.38 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Recorded from the Pachitea River basin (Ref. 38597).  No picture yet.
Characidae Chrysobrycon yoliae Vanegas-Ríos, Azpelicueta & Ortega, 2014 Fr native   5.23 cm SL male/unsexed ;5.15 cm SL female  Known from the unnamed drainage flowing into the río Yucamia system, río Ucayali basin (Ref. 96866).  No picture yet.
Cichlidae Cichla monoculus Agassiz, 1831 Fr, Or native  Tucunari (Spanish), Tucunare (Spanish)  70.00 cm SL male/unsexed  Known from Yarina Cocha on the Ucayali north to the lower Napo (Ref. 57716). Exported as an aquarium fish (Ref. 9235). Also Ref. 36377. 
Cichlidae Cichlasoma amazonarum Kullander, 1983 Fr native  Bujurqui (Spanish)  13.50 cm SL male/unsexed  Known from the Amazon River basin in the Ucayali, Huallaga, Amazon and Yavarí River drainages (Ref. 36377). 
Cichlidae Cichlasoma boliviense Kullander, 1983 Fr native   10.70 cm SL male/unsexed  Nown from the Madre de Dios drainage, Amazon River basin (Ref. 36377). 
Cyclopsettidae Citharichthys gilberti Jenkins & Evermann, 1889 Fr, Br, M native   27.90 cm TL male/unsexed   
Triportheidae Clupeacharax anchoveoides Pearson, 1924 Fr native   6.55 cm SL male/unsexed  Also Ref. 38378.  No picture yet.
Tetraodontidae Colomesus asellus (Müller & Troschel, 1849) Fr native  Pez globito (Spanish)  12.80 cm SL male/unsexed  Known from the Amazon River. 
Serrasalmidae Colossoma macropomum (Cuvier, 1816) Fr, Aq native  Gamitana (Spanish)  108 cm TL male/unsexed  Also Ref. 1739, 9987. 
Apteronotidae Compsaraia samueli Albert & Crampton, 2009 Fr native   22.60 cm SL male/unsexed   
Lebiasinidae Copeina guttata (Steindachner, 1876) Fr native  Urquisho (Spanish)  7.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37104). 
Lebiasinidae Copeina osgoodi Eigenmann, 1922 Fr native  Urquisho (Spanish)  5.10 cm SL male/unsexed  Known from the Amazon River. Also Ref. 598.  No picture yet.
Lebiasinidae Copella nigrofasciata (Meinken, 1952) Fr native  Urquisho (Spanish)  4.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 6329, 37104). 
Cichlidae Coptodon rendalli (Boulenger, 1897) Fr, Br introduced   45.00 cm TL male/unsexed   
Callichthyidae Corydoras acutus Cope, 1872 Fr native  Shirui (Spanish)  5.48 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). 
Callichthyidae Corydoras aeneus (Gill, 1858) Fr native   7.50 cm SL male/unsexed   
Callichthyidae Corydoras agassizii Steindachner, 1876 Fr, Or native  Shirui (Spanish)  5.20 cm SL male/unsexed  Occurs in the upper Amazon, Nauta, Rio Ampiyacu and Rio Maranon (Ref. 26041). Exported as an aquarium fish (Ref. 9235). Also Ref. 1672. 
Callichthyidae Corydoras ambiacus Cope, 1872 Fr native   4.90 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Found in the Rio Ampiyacu (Ref. 26041). 
Callichthyidae Corydoras amphibelus Cope, 1872 Fr native  Shirui (Spanish)   Known from the Amazon River basin (Ref. 37395). Recorded from the Rio Ampiyacu near Pebas, Loreto (Ref. 26041).  No picture yet.
Callichthyidae Corydoras arcuatus Elwin, 1938 Fr, Or native  Shirui (Spanish)  4.00 cm SL male/unsexed  Occurs in the central part of the Peruvian Amazon. Exported as an aquarium fish (Ref. 9235). Also Ref. 26041. 
Callichthyidae Corydoras armatus (Günther, 1868) Fr native  Shirui (Spanish)  5.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Also Ref. 26041. 
Callichthyidae Corydoras atropersonatus Weitzman & Nijssen, 1970 Fr native   4.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). 
Callichthyidae Corydoras copei Nijssen & Isbrücker, 1986 Fr native   3.90 cm SL male/unsexed  Recorded from the lower course of the Rio Huytoyacu, a right bank tributary to the Rio Pastaza (Ref. 26041). 
Callichthyidae Corydoras coriatae Burgess, 1997 Fr native   6.48 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 37395). 
Callichthyidae Corydoras elegans Steindachner, 1876 Fr, Or native  Shirui (Spanish)  5.10 cm SL male/unsexed  Occurs in the Amazon and Ucayali Rivers and also near Iquitos (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Callichthyidae Corydoras fowleri Böhlke, 1950 Fr native  Shirui (Spanish)  6.51 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Also Ref. 26041. 
Callichthyidae Corydoras fulleri Tencatt, Santos, Evers & Britto, 2021 Fr native   5.51 cm SL male/unsexed  Type locality of Corydoras fulleri, Madre de Dios, Tambopata, Las Piedras, stream tributary of the upper río Manuripe (or Manuripi), locally known as 'Alegría', a tributary of the río Orthon, rio Madeira basin, Known only from two tributaries of the río Manuripe, itself a tributary of the río Orthon, and from a tributary of the río Madre de Dios, rio Madeira basin, all close to the border between Peru and Bolivia (Ref. 124435). 
Callichthyidae Corydoras knaacki Tencatt & Evers, 2016 Fr native   3.96 cm SL male/unsexed    No picture yet.
Callichthyidae Corydoras lamberti Nijssen & Isbrücker, 1986 Fr native   3.80 cm SL male/unsexed  Known from only three specimens collected from the lower course of the Rio Huytoyacu, a right bank tributary to the Rio Pastaza (Ref. 26041). 
Callichthyidae Corydoras leopardus Myers, 1933 Fr native   6.10 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). 
Callichthyidae Corydoras leucomelas Eigenmann & Allen, 1942 Fr native  Shirui (Spanish)  4.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Also Ref. 26041. 
Callichthyidae Corydoras loretoensis Nijssen & Isbrücker, 1986 Fr native   3.57 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Recorded from the Rio Nanay, Loreto (Ref. 26041). 
Callichthyidae Corydoras multiradiatus (Orcés V., 1960) Fr native  Shirui (Spanish)  6.70 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Also Ref. 26041. 
Callichthyidae Corydoras napoensis Nijssen & Isbrücker, 1986 Fr native   4.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Found near Iquitos (Ref. 26041). 
Callichthyidae Corydoras ortegai Britto, Lima & Hidalgo, 2007 Fr native   4.50 cm male/unsexed  Found only in the tributaries of the Río Yaguas, a tributary of the lower Río Putumayo in Departamento Loreto, very close to the border with Colombia and Brazil (Ref. 58938). 
Callichthyidae Corydoras panda Nijssen & Isbrücker, 1971 Fr, Or native   3.80 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 37395). Exported to North America as an aquarium fish (Ref. 4537). 
Callichthyidae Corydoras semiaquilus Weitzman, 1964 Fr native   6.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Recorded from the Rio Ucayali system in Loreto (Ref. 26041). 
Callichthyidae Corydoras sodalis Nijssen & Isbrücker, 1986 Fr native   4.86 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Recorded from the Rio Yavari, Loreto (Ref. 26041). 
Callichthyidae Corydoras splendens (Castelnau, 1855) Fr, Or native  Brochis común (Spanish), Shirui (Spanish)  9.90 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Occurs in Rio Ucayali, Rio Napo, Rio Maranon and Rio Ampiyacu (Ref. 26041). Exported as an aquarium fish (Ref. 9235). 
Callichthyidae Corydoras stenocephalus Eigenmann & Allen, 1942 Fr native   6.35 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 37395). Also Ref. 6868. 
Callichthyidae Corydoras sychri Weitzman, 1960 Fr native   4.30 cm SL male/unsexed  Recorded from Rio Nanay in Maynas, Loreto (Ref. 26041).  No picture yet.
Callichthyidae Corydoras trilineatus Cope, 1872 Fr, Or native  Corydoras tres líneas (Spanish), Shirui (Spanish)  6.10 cm SL male/unsexed  Occurs in the Amazon River. Exported as an aquarium fish (Ref. 9235). 
Callichthyidae Corydoras virginiae Burgess, 1993 Fr native   5.10 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 37395). 
Callichthyidae Corydoras weitzmani Nijssen, 1971 Fr, Or native    Known from the Amazon River basin (Ref. 37395). Exported to North America as an aquarium fish (Ref. 4537). 
Callichthyidae Corydoras zygatus Eigenmann & Allen, 1942 Fr native   5.60 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). Recorded from Yurimaguas in Rio Huallaga system, Loreto (Ref. 26041). 
Characidae Creagrutus barrigai Vari & Harold, 2001 Fr native   5.33 cm SL male/unsexed  Found in the Amazon River (Ref. 38376).  No picture yet.
Characidae Creagrutus cerritulus Netto-Ferreira & Vari, 2017 Fr native   5.10 cm SL male/unsexed  Known from Río Cachiyacu, a tributary of the Río Huallaga, Amazon basin in eastern Peru (Ref. 116020).  No picture yet.
Characidae Creagrutus changae Vari & Harold, 2001 Fr native   6.69 cm SL male/unsexed  Found in western tributaries of Ucayali River in Junin, Pasco, and Huanuco (Ref. 38376).  No picture yet.
Characidae Creagrutus cochui Géry, 1964 Fr native  Mojarita (Spanish)  11.30 cm TL male/unsexed  Known from the Amazon River. Also Ref. 598.  No picture yet.
Characidae Creagrutus flavescens Vari & Harold, 2001 Fr native   9.38 cm SL male/unsexed    No picture yet.
Characidae Creagrutus gephyrus Böhlke & Saul, 1975 Fr native   6.50 cm SL male/unsexed  Found in the Andean piedmont rivers of northeastern Peru (Ref. 38376).  No picture yet.
Characidae Creagrutus gracilis Vari & Harold, 2001 Fr native   7.70 cm SL male/unsexed  Found in the Amazonas and Loreto States (Ref. 38376).  No picture yet.
Characidae Creagrutus holmi Vari & Harold, 2001 Fr native   9.20 cm SL male/unsexed  Found in the Marañon River basin above Pongo de Manseriche in northeastern Peru (Ref. 38376).  No picture yet.
Characidae Creagrutus kunturus Vari, Harold & Ortega, 1995 Fr native   9.60 cm SL male/unsexed  Known from the upper Rio Marañon, northeastern Peru. 
Characidae Creagrutus manu Vari & Harold, 2001 Fr native   3.97 cm SL male/unsexed  Found in the upper Manu River basin in southeastern Peru (Ref. 38376).  No picture yet.
Characidae Creagrutus occidaneus Vari & Harold, 2001 Fr native   6.59 cm SL male/unsexed    No picture yet.
Characidae Creagrutus ortegai Vari & Harold, 2001 Fr native   7.11 cm SL male/unsexed  Found in the Huallaga River basin and headwaters of the Aguaytia River (Ref. 38376). 
Characidae Creagrutus ouranonastes Vari & Harold, 2001 Fr native   10.00 cm SL male/unsexed  Found in the upper Apurimac River basin (Ref. 38376).  No picture yet.
Characidae Creagrutus pearsoni Mahnert & Géry, 1988 Fr native   3.40 cm SL male/unsexed  Known from the upper Madeira River basin (Ref. 38376). 
Characidae Creagrutus peruanus (Steindachner, 1876) Fr native  Mojarita (Spanish)  8.70 cm SL male/unsexed  Found in the Apurimac and Urubamba River basins (Ref. 38376). Also Ref. 598. 
Characidae Creagrutus pila Vari & Harold, 2001 Fr native   7.05 cm SL male/unsexed  Found in smaller rivers draining into Aguaytia River, left bank tributary of the Ucayali River (Ref. 38376).  No picture yet.
Characidae Creagrutus ungulus Vari & Harold, 2001 Fr native   10.90 cm TL male/unsexed  Found in the Madre de Dios River basin (Ref. 38376).  No picture yet.
Characidae Creagrutus yanatili Harold & Salcedo, 2010 Fr native   10.00 cm TL male/unsexed  Known from the Rio Urubamba drainage in southeastern Peru (Ref. 83426).  No picture yet.
Cichlidae Crenicara punctulata (Günther, 1863) Fr native   10.00 cm SL male/unsexed  Known from the Amazon River basin and Madre de Dios River drainage (Ref. 36377). 
Cichlidae Crenicichla anthurus Cope, 1872 Fr native   22.40 cm SL male/unsexed  Known from the Amazon River basin, in the Ucayali, Huallaga, Putumayo, and Napo River basins (Ref. 36377). 
Cichlidae Crenicichla cincta Regan, 1905 Fr native  Añashua (Spanish)  19.50 cm SL male/unsexed  Occurs near Iquitos and Pebas and on the lower Napo (Ref. 9088). Found in the Amazon River basin (Ref. 36377). 
Cichlidae Crenicichla cyanonotus Cope, 1870 Fr native   14.80 cm SL male/unsexed  Known from near Pebas, Yarina, Cocha, Iquitos and Cuiabá on the River Icá (Ref. 9088). Found in the Amazon River basin (Ref. 36377).  No picture yet.
Cichlidae Crenicichla johanna Heckel, 1840 Fr native   28.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Cichlidae Crenicichla lucius Cope, 1870 Fr native   16.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). 
Cichlidae Crenicichla proteus Cope, 1872 Fr native   15.50 cm SL male/unsexed  Known from the Ucayali-Amazon drainage from Chicosa to Pebas (Ref. 36377). 
Cichlidae Crenicichla reticulata (Heckel, 1840) Fr native  Añashua (Spanish)  29.50 cm SL male/unsexed ;23.00 cm SL female  Known from the Amazon River basin (Ref. 36377). 
Cichlidae Crenicichla sedentaria Kullander, 1986 Fr native   22.10 cm SL male/unsexed  Known from the Amazon River basin, in the upper Ucayali River drainage, upper Huallaga River drainage (Tingo María) (Ref. 36377). Type locality: Peru, departamento Pasco, Río Pachitea drainage system, in Río Yamushimas, tributary to Rio Palcazú, near San Pedro de Longin (Ref. 33021). 
Cichlidae Crenicichla semicincta Steindachner, 1892 Fr native   17.10 cm SL male/unsexed  Known from the Amazon River basin, in the Madre de Dios River drainage (Ref. 36377). 
Crenuchidae Crenuchus spilurus Günther, 1863 Fr native   5.70 cm TL male/unsexed  Known from the Amazon River basin (Ref. 37059). 
Characidae Ctenobrycon hauxwellianus (Cope, 1870) Fr native  Mojara (Spanish)  8.00 cm SL male/unsexed  Found in the Amazon River (Ref. 38376). 
Xenocyprididae Ctenopharyngodon idella (Valenciennes, 1844) Fr introduced   150 cm TL male/unsexed   
Curimatidae Curimata aspera Günther, 1868 Fr native  Chio chio (Spanish)  21.20 cm SL male/unsexed  Also Ref. 34109.  No picture yet.
Curimatidae Curimata cisandina (Allen, 1942) Fr native  Julilla (Spanish)  12.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 6329, 38013). Also Ref. 34109.  No picture yet.
Curimatidae Curimata knerii Steindachner, 1876 Fr native  Yahuarachi (Spanish)  17.70 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013).  No picture yet.
Curimatidae Curimata vittata (Kner, 1858) Fr, Or native  Roncador (Spanish), Curimata de franjas (Spanish), Ractafogón (Spanish), Yahuarachi (Spanish)  19.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013). Occurs in Ampiyacu, Tigre, Mazán, Pastaza and Ucayali Rivers. Also found in Pevas and Contamana. Exported as an aquarium fish (Ref. 9235). Also Ref. 6329, 34109. 
Curimatidae Curimatella alburnus (Müller & Troschel, 1844) Fr native  Llambina (Spanish)  18.80 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). Also Ref. 28798, 38013.  No picture yet.
Curimatidae Curimatella dorsalis (Eigenmann & Eigenmann, 1889) Fr native   14.90 cm TL male/unsexed  Known from Rio Amazonas (Ref. 28798). Also Ref. 38013. 
Curimatidae Curimatella immaculata (Fernández-Yépez, 1948) Fr native   18.80 cm TL male/unsexed  Known from the Amazon River basins (Ref. 38013). Also Ref. 28798. 
Curimatidae Curimatella meyeri (Steindachner, 1882) Fr native  Yahuarachi (Spanish)  18.40 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 28798, 38013.  No picture yet.
Curimatidae Curimatopsis macrolepis (Steindachner, 1876) Fr, Fi native   6.00 cm SL male/unsexed  Kown from the Amazon River basin (Ref. 38013). Also Ref. 4537. 
Cynodontidae Cynodon gibbus (Agassiz, 1829) Fr native  Dientón (Spanish), Chambira (Spanish)  32.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38270). 
Characidae Cynopotamus amazonum (Günther, 1868) Fr native  Denton (Spanish)  18.00 cm SL male/unsexed ;23.10 cm female  Known from the Amazon River (Ref. 6329).  No picture yet.
Curimatidae Cyphocharax derhami Vari & Chang, 2006 Fr native   8.92 cm SL male/unsexed  Known from Rio Marañon basin and Rio Ucayali basin in northeastern Peru (Ref. 56958).  No picture yet.
Curimatidae Cyphocharax festivus Vari, 1992 Fr native   16.70 cm TL male/unsexed  Known from the Amazon River basin (Ref. 38013). Museum: caños entering Rio Nanay, NE of Iquitos, USNM 280426 (holotype, 6.26 cm SL); other specimens taken from the Rio Nanay system (Ref. 11334). Also Ref. 27925. 
Curimatidae Cyphocharax notatus (Steindachner, 1908) Fr native   14.70 cm SL male/unsexed  Known from Loreto and Madre de Dios (Ref. 11334).  No picture yet.
Curimatidae Cyphocharax pantostictos Vari & Barriga Salazar, 1990 Fr native   9.80 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). Museum: Loreto: Rio Nanay, USNM 280573; small stream ca.65 km upstream from the mouth of Rio Nanay, ANSP 164981; Rio Putumayo drainage, El Estrecho, Quebrada de las Granjas, NRM 26567; along the road from Genero Herrera towards Peruvian-Brazilian border, Rio Ucayali drainage, ANSP 164980 (Ref. 11334).  No picture yet.
Curimatidae Cyphocharax plumbeus (Eigenmann & Eigenmann, 1889) Fr native   17.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013). Museum: Loreto, Sansho Caño, USNM 175865-6. Caño draining into Rio Maniti, USNM 280428 (Ref. 11334).  No picture yet.
Curimatidae Cyphocharax spiluropsis (Eigenmann & Eigenmann, 1889) Fr native   9.00 cm SL male/unsexed  Known from the fresh water of Loreto, Ucayali, and Madre de Dios states (Ref. 11334).  No picture yet.
Curimatidae Cyphocharax vexillapinnus Vari, 1992 Fr native   6.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013). Museum: Loreto, Rio Itaya, main river channel and mouth of caños entering river, 10 km upstream of Belén (Iquitos), USNM 296394 (holotype, 6.3 cm SL); USNM 296361; MUSM 2721; MZUSP 41761 (paratypes). Rio Corrientes drainage, NRM 26869 (Ref. 11334). Also Ref. 27925.  No picture yet.
Cyprinidae Cyprinus carpio Linnaeus, 1758 Fr, Aq introduced   120 cm TL male/unsexed   
Characidae Dectobrycon armeniacus Zarske & Géry, 2006 Fr native   6.62 cm SL male/unsexed   
Callichthyidae Dianema longibarbis Cope, 1872 Fr, Or native  Porthol comun (Spanish), Shirui (Spanish)  9.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37395). Occurs in Samiria River (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Sternopygidae Distocyclus conirostris (Eigenmann & Allen, 1942) Fr native   50.00 cm TL male/unsexed  Found in the Amazon River (Ref. 39524).  No picture yet.
Eleotridae Dormitator latifrons (Richardson, 1844) Fr native   41.00 cm TL male/unsexed ;39.00 cm TL female   
Pimelodidae Duopalatinus peruanus Eigenmann & Allen, 1942 Fr native   15.00 cm SL male/unsexed  Type locality: Río Puinagua, mouth of Río Pacaya, Río Ucayali system, Peru (Ref. 26282, 6868).  No picture yet.
Auchenipteridae Duringlanis perugiae (Steindachner, 1882) Fr native  Pirillo (Spanish)  5.00 cm SL male/unsexed  Known from the Amazon River (Ref. 37098) 
Sternopygidae Eigenmannia virescens (Valenciennes, 1836) Fr native   44.00 cm SL male/unsexed  Also Ref. 26543. 
Crenuchidae Elachocharax pulcher Myers, 1927 Fr native   2.21 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37059). Recorded from the Nanay river at Mishana (Ref. 13683). 
Gymnotidae Electrophorus varii de Santana, Wosiacki, Crampton, Sabaj, Dillman, Mendes-Júnior & Castro e Castro, 2019 Fr native   149 cm TL male/unsexed  Collected from the Purus River a tributary of the Amazon River (Ref. 120918).  No picture yet.
Eleotridae Eleotris picta Kner, 1863 Fr, Br native  common (usually seen) 44.00 cm SL male/unsexed   
Triportheidae Engraulisoma taeniatum Castro, 1981 Fr native  Mojara (Spanish)  4.20 cm SL male/unsexed    No picture yet.
Auchenipteridae Epapterus dispilurus Cope, 1878 Fr native  Maparate (Spanish)  15.40 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). Also Ref. 37098.  No picture yet.
Characidae Eretmobrycon festae (Boulenger, 1898) Fr native  Chirichigno (Spanish)    
Aspredinidae Ernstichthys megistus (Orcés V., 1961) Fr native   6.70 cm SL male/unsexed  Known from Marañon River basin (Ref. 36695).  No picture yet.
Loricariidae Etsaputu relictum Lujan, Armbruster & Rengifo, 2011 Fr native    Known from the upper Marañon River in northern Peru (Ref. 88957).  No picture yet.
Gerreidae Eucinostomus currani Zahuranec, 1980 Fr, Br, M native   21.00 cm TL male/unsexed   
Gerreidae Eucinostomus gracilis (Gill, 1862) Fr, Br, M native  Mojarra (Spanish)  21.00 cm TL male/unsexed  Also Ref. 2850. 
Pimelodidae Exallodontus aguanai Lundberg, Mago-Leccia & Nass, 1991 Fr native   20.00 cm SL male/unsexed   
Loricariidae Farlowella nattereri Steindachner, 1910 Fr native   26.50 cm SL male/unsexed  Found in the Amazon River basin (Ref. 36389). 
Loricariidae Farlowella oxyrryncha (Kner, 1853) Fr native  Shitari (Spanish)  23.00 cm SL male/unsexed  Found in the Amazon River (Ref. 36389).  No picture yet.
Loricariidae Farlowella platorynchus Retzer & Page, 1997 Fr native   19.40 cm SL male/unsexed  Found in the Amazon River (Ref. 36389). 
Loricariidae Fonchiiloricaria nanodon Rodriguez, Ortega & Covain, 2011 Fr native   17.46 cm male/unsexed  Type locality, Río Huallaga between Tingo Maria and Aucayacu, Leoncio Prado, Huanuco, MUSM 37953 (holotype of Fonchiiloricaria nanodon, 16.08 cm SL). Collected in the middle Rio Huallaga drainage, in the vicinity of Tingo Maria, ca 9°19'22'' S; 76°01' 50''W (Ref. 87853).  No picture yet.
Characidae Galeocharax gulo (Cope, 1870) Fr native  Denton (Spanish)  18.80 cm SL male/unsexed ;25.00 cm SL female  Known from the Amazon River (Ref. 6329). Also Ref. 36811.  No picture yet.
Poeciliidae Gambusia affinis (Baird & Girard, 1853) Fr, Br introduced   5.10 cm TL male/unsexed ;7.00 cm TL female   
Gasteropelecidae Gasteropelecus sternicla (Linnaeus, 1758) Fr, Or native  Pechito plateado de raya negra (Spanish), Pechito (Spanish), Sternicla (Spanish)  3.90 cm SL male/unsexed  Occurs in the Amazon region and vicinity of Iquitos. Exported as an aquarium fish (Ref. 9235). 
Auchenipteridae Gelanoglanis travieso Rengifo & Lujan, 2008 Fr native   2.92 cm SL male/unsexed ;3.04 cm SL female  Known from the Marañon River, a whitewater tributary of the Amazon River in northeastern Peru (Ref. 78576).  No picture yet.
Cichlidae Geophagus proximus (Castelnau, 1855) Fr native  Bujurqui (Spanish)  34.80 cm TL male/unsexed ;26.60 cm female  Known from the Amazon River basin in the Ucayali River drainage (Ref. 36377). Type locality: R. Ucayali, Mission Saraycu (Ref. 6329). 
Gerreidae Gerres simillimus Regan, 1907 Fr, Br, M native  Chavela (Spanish), Mojarra (Spanish)  41.00 cm TL male/unsexed  Also Ref. 92517. 
Crenuchidae Geryichthys sterbai Zarske, 1997 Fr native   3.00 cm SL male/unsexed  Known from the upper Amazon River basin at the region of Iquitos and Ucayali drainage (Ref. 37059).  No picture yet.
Gobiesocidae Gobiesox multitentaculus (Briggs, 1951) Fr native   6.30 cm SL male/unsexed    No picture yet.
Gobiidae Gobioides peruanus (Steindachner, 1880) Fr, Br native   45.00 cm TL male/unsexed   
Eleotridae Gobiomorus maculatus (Günther, 1859) Fr native   27.00 cm SL male/unsexed   
Heptapteridae Goeldiella eques (Müller & Troschel, 1849) Fr native   28.90 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36914). 
Characidae Gymnocorymbus flaviolimai Benine, Melo, Castro & Oliveira, 2015 Fr native   5.15 cm SL male/unsexed  Known from the Rio Madeira of the Amazon basin (Ref. 101636).  No picture yet.
Gymnotidae Gymnotus carapo Linnaeus, 1758 Fr native   76.00 cm TL male/unsexed  Not in Ref. Ref. 36692. 
Gymnotidae Gymnotus chaviro Maxime & Albert, 2009 Fr native  Anguilla (Spanish)  27.50 cm SL male/unsexed  Type locality, Dept. Ucayali, Quebrada Dos y medio, a small terra firme stream ca. 2 km NW the town of Breu, on the Alto Yuruá River, MUSM 33715 (holotype of Gymnotus chaviro, 23.3 cm TL). Known from the upper Yuruá basin, Department Ucayali and the Manu and Tampobata rivers of the Madre de Dios basin, Department Madre de Dios (Ref. 83382).  No picture yet.
Gymnotidae Gymnotus curupira Crampton, Thorsen & Albert, 2005 Fr native   23.50 cm TL male/unsexed  Known from terra firme stream pools near the town of Jenaro Herrera in the Upper Amazon (near the confluence of the Rio Marañon and Rio Ucayali) and from localities in Napo and Putumayo basins (Ref. 55508).  No picture yet.
Gymnotidae Gymnotus javari Albert, Crampton & Hagedorn, 2003 Fr native  Macana (Spanish)  20.10 cm TL male/unsexed  Type locality: Quebrada Caraná nr. Buen Sucesso, Río Yavari (Rio Javarí), Loreto Department (Ref. 49716).  No picture yet.
Gymnotidae Gymnotus melanopleura Albert & Crampton, 2001 Fr native   10.00 cm TL male/unsexed  Recorded from Rio Napo drainage, Loreto, Peru.  No picture yet.
Gymnotidae Gymnotus tigre Albert & Crampton, 2003 Fr native  Macana tigre (Spanish)  41.10 cm TL male/unsexed    No picture yet.
Gymnotidae Gymnotus ucamara Crampton, Lovejoy & Albert, 2003 Fr native   19.00 cm TL male/unsexed  Known only from the lowland Rio Ucayali basin, at sites near Contamana and in the Rio Pacaya-Samiria National Reserve near the confluence of the Rio Ucayali and Rio Marañon (Ref. 49730). Type locality: Loreto, Rio Ucayali, Rio Pacaya, Cocha Zapote, in Pacaya-Samiria National Reserve (Ref. 49730).  No picture yet.
Gymnotidae Gymnotus varzea Crampton, Thorsen & Albert, 2005 Fr native   28.50 cm TL male/unsexed  Known from localities in the Amazon basin near the confluence of the Rio Marañon and Rio Ucayali, and near the town of Iquitos on the Rio Amazonas (Ref. 55508).  No picture yet.
Doradidae Hassar orestis (Steindachner, 1875) Fr native  Chanchito (Spanish)  29.80 cm TL male/unsexed  Occurrence uncertain, based on questionable synonym of Hassar ucayalensis (Ref. 37054). 
Cetopsidae Helogenes marmoratus Günther, 1863 Fr native   7.90 cm SL male/unsexed  Found in the Amazon basin. 
Characidae Hemibrycon divisorensis Bertaco, Malabarba, Hidalgo & Ortega, 2007 Fr native   6.84 cm SL male/unsexed ;8.16 cm SL female  Type locality, Río Ucayali drainage, quebrada en la trocha 1, upper río Tapiche, Requena, Zona Reservada Sierra del Divisor, Loreto, MUSM 28860 (holotype of Hemibrycon divisorensis, 6.82 cm SL, male). Known only from río Tapiche drainage, a tributary to the río Ucayali, Loreto, and it is included in the conservation area 'Zona Reservada Sierra del Divisor' recently established by the Peruvian government (Ref. 75799).  No picture yet.
Characidae Hemibrycon helleri Eigenmann, 1927 Fr native  Mojara (Spanish)  10.00 cm SL male/unsexed  Type locality: río Comberciato, a small tributary of middle río Urubamba, 30 miles above the Pongo de Mainique, Cusco, MCZ 31565 (holotype fo Hemibrycon helleri, 7.89 cm SL, female) (Ref. 85819). Known from the Amazon River (Ref. 6329); also recorded from the Rio Urubamba (Ref. 598). Also Ref. 38376, 75799.  No picture yet.
Characidae Hemibrycon huambonicus (Steindachner, 1882) Fr native  Mojara (Spanish)  11.90 cm SL male/unsexed  Type locality, Huambo, NMW 57531 (synntype of Hemibrycon huambonicus). Known from río Huambo, río Crisnejas and río Tingo, all tributaries of río Huallaga drainage, and río Marañon drainage, upper río Amazonas basin (Ref. 85819). Also Ref. 38376, 75799. 
Characidae Hemibrycon inambari Bertaco & Malabarba, 2010 Fr native   6.95 cm SL male/unsexed ;8.73 cm SL female  Type locality, río Araza, río Inambari basin, upper río Madre de Dios drainage, Sirihua, Camanti, Quispicanchi, Cusco, MUSM 35491 (holotype of Hemibrycon inambari, 6.54 cm SL, male). Found in río Alto Madre de Dios and río Inambari drainages, upper río Madre de Dios drainage (Ref. 85819).  No picture yet.
Characidae Hemibrycon jelskii (Steindachner, 1876) Fr native  Mojara (Spanish)  7.79 cm SL male/unsexed ;10.17 cm SL female  Type locality, Monterico in Peru [Monterrico, Department of Ayacucho, río Ucayali drainage] (Ref. 85819). Found in the Remac River basin near Lima (Ref. 38376). Also Ref. 75799.  No picture yet.
Characidae Hemibrycon mikrostiktos Bertaco & Malabarba, 2010 Fr native   4.44 cm SL male/unsexed  Type locality, río Aguaytía, río Negro, upper río Ucayali basin, Aguaytía, Padre Abad, Ucayali, MUSM 35490 (holotype fo Hemibrycon mikrostiktos, 4.44 cm SL). Found in río Aguaytía, upper río Ucayali drainage in Ucayali (Ref. 85819).  No picture yet.
Characidae Hemibrycon tridens Eigenmann, 1922 Fr native   6.50 cm SL male/unsexed  Type locality, 24 leagues from Cusco, Curuhuasi, province of Aymaraes, Department of Apurimac, CAS 44358 (holotype of Hemibrycon tridens, 5.15 cm SL, male, x-ray) (Ref.85819). Known from río Apurimac, upper río Ucayali drainage, Curuhuasi (Ref. 598, 75799, 85819).  No picture yet.
Doradidae Hemidoras morrisi Eigenmann, 1925 Fr native  Rego rego (Spanish)  14.40 cm SL male/unsexed  Found in Iquitos (Ref. 3838). Known from the Amazon River (Ref. 37054). 
Doradidae Hemidoras stenopeltis (Kner, 1855) Fr native  Rego rego (Spanish)  19.40 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Doradidae Hemidoras stuebelii (Steindachner, 1882) Fr native  Pirillo (Spanish)  15.20 cm SL male/unsexed  Found in the Rio Huallaga (Ref. 6868). Known from the Amazon River (Ref. 37054). 
Characidae Hemigrammus boesemani Géry, 1959 Fr native   3.31 cm SL male/unsexed    No picture yet.
Characidae Hemigrammus changae Ota, Lima & Hidalgo, 2019 Fr native   3.21 cm SL male/unsexed  Type locality of Hemigrammus changae, Departamento Madre de Dios, Puerto Maldonado, Aguajal Cicra, Aguajal Pozo Minero (Ref. 120197). 
Characidae Hemigrammus hyanuary Durbin, 1918 Fr, Or native  Enero tetra (Spanish), Mojarita (Spanish)  4.40 cm TL male/unsexed  Occurs in tributaries of the Amazon River, near Leticia, Colombia. Exported as an aquarium fish (Ref. 9235). Also Ref. 38376. 
Characidae Hemigrammus luelingi Géry, 1964 Fr native  Mojarita (Spanish)  2.51 cm SL male/unsexed  Recorded from the lower Ucayali (Ref. 598). Also Ref. 38376. 
Characidae Hemigrammus lunatus Durbin, 1918 Fr native   4.80 cm TL male/unsexed    No picture yet.
Characidae Hemigrammus marginatus Ellis, 1911 Fr native   4.50 cm SL male/unsexed  Also Ref. 38376. 
Characidae Hemigrammus megaceps Fowler, 1945 Fr native   2.80 cm TL male/unsexed  Also Ref. 598. 
Characidae Hemigrammus ocellifer (Steindachner, 1882) Fr, Or native  Tetra ocelada (Spanish), Mojarita (Spanish)  4.90 cm TL male/unsexed  Occurs in the Amazon river and in tributaries near the town of Iquitos. Exported as an aquarium fish (Ref. 9235). Also Ref. 38376. 
Characidae Hemigrammus pulcher Ladiges, 1938 Fr, Or native  Tetra granate (Spanish), Mojarita (Spanish)  3.28 cm SL male/unsexed  Occurs in the middle part of the Peruvian Amazon and vicinity of Iquitos. Exported as an aquarium fish (Ref. 9235). Also Ref. 38376. 
Characidae Hemigrammus rodwayi Durbin, 1909 Fr native   5.30 cm TL male/unsexed  Also Ref. 38376. 
Characidae Hemigrammus unilineatus (Gill, 1858) Fr native   5.30 cm TL male/unsexed   
Loricariidae Hemiodontichthys acipenserinus (Kner, 1853) Fr native  Shitari (Spanish)  13.40 cm SL male/unsexed  Found in the Amazon River (Ref. 36389). 
Hemiodontidae Hemiodus amazonum (Humboldt, 1821) Fr native  Julilla (Spanish)  20.50 cm SL male/unsexed  Known from the Amazon River.  No picture yet.
Hemiodontidae Hemiodus atranalis (Fowler, 1940) Fr native  Julilla (Spanish)  20.00 cm SL male/unsexed  Known from the Amazon River. 
Hemiodontidae Hemiodus unimaculatus (Bloch, 1794) Fr native   32.90 cm SL male/unsexed ;29.40 cm SL female   
Pimelodidae Hemisorubim platyrhynchos (Valenciennes, 1840) Fr, Or native  Toa (Spanish)  61.00 cm TL female  Occurs in Ucayali and Marañón Rivers and adjoining lagoons. Exported as an aquarium fish (Ref. 9235). 
Trichomycteridae Henonemus punctatus (Boulenger, 1887) Fr native   9.00 cm NG male/unsexed  Known from the Amazon River basin (Ref. 39970). 
Cichlidae Heroina isonycterina Kullander, 1996 Fr native   10.20 cm SL male/unsexed  Found in Rio Amazonas, Rio Corrientes, Rio Pastaza and Rio Tigre drainages (Ref. 26648). Also Ref. 36377. 
Cichlidae Heros efasciatus Heckel, 1840 Fr, Or native  Bujurqui acha vieja (Spanish), Bujurqui (Spanish)  17.00 cm SL male/unsexed  Reported from Rio Negro, its type locality, in the Peruvian Amazon and Araguay (Ref. 35237). Occurs in the Amazon, Ucayali, Marañón (and adjoining lagoons) and Nanay Rivers; also in Lake Quistococha. Exported as an aquarium fish (Ref. 9235). Also Ref. 36377. 
Acestrorhynchidae Heterocharax macrolepis Eigenmann, 1912 Fr native   4.75 cm SL male/unsexed   
Ariidae Hexanematichthys henni Fisher & Eigenmann, 1922 Fr native      No picture yet.
Erythrinidae Hoplerythrinus unitaeniatus (Spix & Agassiz, 1829) Fr native   28.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37025). 
Erythrinidae Hoplias malabaricus (Bloch, 1794) Fr native   65.00 cm TL male/unsexed  Tributaries of the Amazon. 
Erythrinidae Hoplias microlepis (Günther, 1864) Fr native   36.00 cm SL male/unsexed  Known from the río Tumbes in northwestern Peru (Ref. 96873). 
Callichthyidae Hoplosternum littorale (Hancock, 1828) Fr native   26.30 cm TL male/unsexed  Recorded from Rio Ampyiacu and Rio Ucayali (Ref. 26144). 
Cynodontidae Hydrolycus scomberoides (Cuvier, 1819) Fr native  Chambira (Spanish)  117 cm TL male/unsexed  Known from the Amazon basin (Ref. 6329). Museum: Rio Ucayali, USNM 231549 (Ref. 13118). Also Ref. 38270. 
Characidae Hyphessobrycon bentosi Durbin, 1908 Fr, Or native  Mojarita (Spanish), Rosy tetra (English)  4.32 cm SL male/unsexed  Occurs almost throughout the Amazon River system. Exported as an aquarium fish (Ref. 9235). Also Ref. 598. 
Characidae Hyphessobrycon clavatus Zarske, 2015 Fr native   3.06 cm SL male/unsexed  Type locality. 
Characidae Hyphessobrycon erythrostigma (Fowler, 1943) Fr, Or native  Punto rojo (Spanish), Mojarita (Spanish)  6.06 cm SL male/unsexed  Occurs in the Amazon and Nanay River (near the town of Iquitos). Exported as an aquarium fish (Ref. 9235). 
Characidae Hyphessobrycon eschwartzae García-Alzate, Román-Valencia & Ortega, 2013 Fr native   3.16 cm SL male/unsexed  Known from the Madre de Dios River drainage (Ref. 93393).  No picture yet.
Characidae Hyphessobrycon frankei Zarske & Géry, 1997 Fr native   3.35 cm SL male/unsexed    No picture yet.
Characidae Hyphessobrycon gracilior Géry, 1964 Fr native   2.15 cm SL male/unsexed  Found in the upper Amazon River basin (Ref. 38376). Recorded from a small creek connecting "Zapote Cocha" and "Caño Yarina", on edge of Río Pacaya, trib. of lower Río Ucayali (Ref. 26282). Also Ref. 598.  No picture yet.
Characidae Hyphessobrycon jackrobertsi Zarske, 2014 Fr native   3.38 cm SL male/unsexed  Known from the río Pastaza basin (Ref. 96662). 
Characidae Hyphessobrycon loretoensis Ladiges, 1938 Fr, Or native  Tetra loreto (Spanish), Mojarita (Spanish)  2.44 cm SL male/unsexed  Found in the upper Amazon River basin (Ref. 38376). Occurs in tributaries around Iquitos and in Nanay River. Exported as an aquarium fish (Ref. 9235). Also Ref. 598. 
Characidae Hyphessobrycon margitae Zarske, 2016 Fr native   4.00 cm SL male/unsexed  Type locality of Hyphessobrycon margitae, Loreto, rio Nanay (Ref. 123638). 
Characidae Hyphessobrycon nigricinctus Zarske & Géry, 2004 Fr native    Type locality, Río Madre de Dios (Ref. 54621). Needs a better reference. 
Characidae Hyphessobrycon peruvianus Ladiges, 1938 Fr, Or native  Tetra peruano (Spanish), Mojarita (Spanish)  3.86 cm SL male/unsexed  Found in the upper Amazon River basin (Ref. 38376). Occurs in tributaries around Iquitos and in Nanay River. Exported as an aquarium fish (Ref. 9235). Also Ref. 598. 
Characidae Hyphessobrycon robustulus (Cope, 1870) Fr native  Mojarita (Spanish)  4.40 cm TL male/unsexed  Recorded from the Amazon. 
Characidae Hyphessobrycon taphorni García-Alzate, Román-Valencia & Ortega, 2013 Fr native   2.93 cm SL male/unsexed  Known from the Madre de Dios River drainage (Ref. 93393).  No picture yet.
Characidae Hyphessobrycon tenuis Géry, 1964 Fr native   2.60 cm SL male/unsexed  Recorded from the Upper Amazon.  No picture yet.
Achiridae Hypoclinemus mentalis (Günther, 1862) Fr native  Lenguado (Spanish)  21.60 cm SL male/unsexed   
Doradidae Hypodoras forficulatus Eigenmann, 1925 Fr native  Pirillo (Spanish)  10.40 cm SL male/unsexed  Found in Iquitos (Ref. 6868). Known from the Amazon River basin (Ref. 37054). 
Xenocyprididae Hypophthalmichthys molitrix (Valenciennes, 1844) Fr introduced   120 cm TL male/unsexed   
Pimelodidae Hypophthalmus edentatus Spix & Agassiz, 1829 Fr native  Maparate (Spanish)  57.50 cm TL male/unsexed  Amazon river (Ref. 6329). 
Pimelodidae Hypophthalmus fimbriatus Kner, 1858 Fr native   46.50 cm TL male/unsexed   
Pimelodidae Hypophthalmus marginatus Valenciennes, 1840 Fr native  Maparate (Spanish)  56.00 cm TL male/unsexed  Amazon river (Ref. 6329). 
Loricariidae Hypoptopoma bianale Aquino & Schaefer, 2010 Fr native   5.37 cm TL female  Known from Loreto and Ucayali (Ref. 84367).  No picture yet.
Loricariidae Hypoptopoma brevirostratum Aquino & Schaefer, 2010 Fr native   5.06 cm TL male/unsexed    No picture yet.
Loricariidae Hypoptopoma gulare Cope, 1878 Fr native   13.50 cm TL male/unsexed  Found in the Amazon River basin (Ref. 36885). Type locality: Pebas, Peru (Ref. 6868). 
Loricariidae Hypoptopoma incognitum Aquino & Schaefer, 2010 Fr native   10.80 cm SL male/unsexed  Known from Madre de Dios (Ref. 84367).  No picture yet.
Loricariidae Hypoptopoma psilogaster Fowler, 1915 Fr native   7.00 cm SL male/unsexed  Found in the Amazon River (Ref. 6868, 36885). 
Loricariidae Hypoptopoma steindachneri Boulenger, 1895 Fr native   10.00 cm SL male/unsexed  Found in the Amazon River (Ref. 36885); Loreto (Ref. 84367). 
Loricariidae Hypoptopoma thoracatum Günther, 1868 Fr native   11.50 cm TL male/unsexed  Type locality: Xeberos, upper Amazon R., BMNH 1867-6:13-38 (holotype of Hypoptopoma thoracatum, 7.62 cm SL) (Ref. 84367). Found in the Amazon River (Ref. 36885). 
Hypopomidae Hypopygus ortegai de Santana & Crampton, 2011 Fr native   11.40 cm TL male/unsexed    No picture yet.
Loricariidae Hypostomus ericius Armbruster, 2003 Fr native   18.68 cm SL male/unsexed  Known from Rios Marañon, Itaya and Nanay of the upper Rio Amazonas drainage (Ref. 50589). 
Loricariidae Hypostomus fonchii Weber & Montoya-Burgos, 2002 Fr native   15.40 cm SL male/unsexed  Recorded from the Cushabatay River basin (Ref. 36817); Río Ucayali basin (Ref. 95502).  No picture yet.
Cichlidae Hypselecara temporalis (Günther, 1862) Fr native  Bufurque (Spanish), Bujurqui (Spanish)  15.00 cm SL male/unsexed  Found along the Ucayali-Amazonas downstream from about Pucallpa and many localities to the east along Solimoes (Ref. 9088). Also Ref. 36377. 
Iguanodectidae Iguanodectes purusii (Steindachner, 1908) Fr native   7.50 cm SL male/unsexed    No picture yet.
Iguanodectidae Iguanodectes spilurus (Günther, 1864) Fr native  Mojarita (Spanish)  10.15 cm SL male/unsexed   
Pristigasteridae Ilisha amazonica (Miranda Ribeiro, 1920) Fr native   19.70 cm SL male/unsexed  Known from the Amazon River basin (Ref. 50628). 
Heptapteridae Imparfinis guttatus (Pearson, 1924) Fr native   12.70 cm SL male/unsexed  Occurs in the Mamoré River basin (Ref. 36914).  No picture yet.
Heptapteridae Imparfinis nemacheir (Eigenmann & Fisher, 1916) Fr native   9.90 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 36914). 
Heptapteridae Imparfinis pseudonemacheir Mees & Cala, 1989 Fr native   4.00 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 36914). 
Characidae Jupiaba asymmetrica (Eigenmann, 1908) Fr native  Mojara (Spanish)   Known from the Amazon River. Also Ref. 27970.  No picture yet.
Crenuchidae Klausewitzia ritae Géry, 1965 Fr native   2.50 cm SL male/unsexed  Recorded from the Amazon (Ref. 13683). Also Ref. 37059.  No picture yet.
Characidae Knodus borki Zarske, 2008 Fr native    Found in Iquitos (Ref. 79634). 
Characidae Knodus megalops Myers, 1929 Fr native  Mojarita (Spanish)  6.90 cm TL male/unsexed  Known from the Amazon River. Also Ref. 598. 
Characidae Knodus moenkhausii (Eigenmann & Kennedy, 1903) Fr native  Mojarita (Spanish)  4.50 cm TL male/unsexed  Reported from the Amazon River (Ref. 6329). 
Characidae Knodus pasco Zarske, 2007 Fr native   5.54 cm SL male/unsexed  Found in San Antonio de Cacazú, Departamento Pasco (Ref. 58757).  No picture yet.
Anostomidae Laemolyta garmani (Borodin, 1931) Fr native  Lisa (Spanish)  21.40 cm SL male/unsexed  Known from the Amazon basin. 
Anostomidae Laemolyta macra Géry, 1974 Fr native   7.10 cm SL male/unsexed  Known from Marañon River basin (Ref. 36801).  No picture yet.
Anostomidae Laemolyta taeniata (Kner, 1858) Fr, Or native  Anostomus de banda negra (Spanish), Lisa (Spanish)  28.80 cm SL male/unsexed  Known from the Amazon River (Ref. 6329, 36801). Reported from Pacaya and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Cichlidae Laetacara flavilabris (Cope, 1870) Fr native  Bujurqui (Spanish)  8.20 cm SL male/unsexed  Known from the Huallaga, Ucayali, Amazon, Putumayo and Yavarí River basins (Ref. 36377). Also Ref. 9088. 
Cichlidae Laetacara thayeri (Steindachner, 1875) Fr native  occasional (usually not seen) 12.00 cm TL male/unsexed  Known from the Tigre, Ucayali, Yavarí and Amazon River basins (Ref. 36377). 
Rivulidae Laimosemion rectocaudatus (Fels & de Rham, 1981) Fr endemic   6.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36579). Also Ref. 27139. 
Loricariidae Lamontichthys filamentosus (La Monte, 1935) Fr native  Shitari (Spanish)  16.70 cm SL male/unsexed  Known from the Amazon River (Ref. 36389). 
Loricariidae Lasiancistrus heteracanthus (Günther, 1869) Fr native  Carachama (Spanish)  15.30 cm SL male/unsexed  Known from Marañon River basin (Ref. 36713); lower río Napo (Ref. 56920). Also Ref. 6868. 
Loricariidae Lasiancistrus schomburgkii (Günther, 1864) Fr native  Carachama (Spanish)  14.40 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 36713). Also Ref. 56920. 
Lebiasinidae Lebiasina bimaculata Valenciennes, 1847 Fr native  Las Penitas (Spanish), Chalquoque (Spanish), Choro-coque (Spanish), Guavina (Spanish), Huaija (Spanish)  16.00 cm SL male/unsexed  Recorded from the upper Río Marañon. 
Pimelodidae Leiarius marmoratus (Gill, 1870) Fr, Or native  Ashara (Spanish), Bagre (Spanish), Sailfin pimeloid (English)  100.00 cm TL male/unsexed  Occurs in Pacaya and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Pimelodidae Leiarius pictus (Müller & Troschel, 1849) Fr native   60.00 cm TL male/unsexed   
Lepidosirenidae Lepidosiren paradoxa Fitzinger, 1837 Fr native   125 cm TL male/unsexed  Recorded from the Ucayali River and from the basin of the Río de la Plata (Ref. 12225). Also Ref. 36887. 
Anostomidae Leporellus vittatus (Valenciennes, 1850) Fr, Or native  Lisa de cola negra (Spanish), Lisa (Spanish)  30.00 cm SL male/unsexed  Occurs in Napo River and near Iquitos. Exported as an aquarium fish (Ref. 9235). 
Anostomidae Leporinus fasciatus (Bloch, 1794) Fr, Or native  Leporinus listado (Spanish), Leporinus de franjas (Spanish), Lisa (Spanish)  37.00 cm TL male/unsexed  Occurs in Ucayali river. Exported as an aquarium fish (Ref. 9235). Also Ref. 36801. 
Anostomidae Leporinus holostictus Cope, 1878 Fr native  Lisa (Spanish)   Known from the Amazon River (Ref. 6329, 36801).  No picture yet.
Anostomidae Leporinus jamesi Garman, 1929 Fr native   15.49 cm SL male/unsexed  Known from río Ucayali (Ref. 96869).  No picture yet.
Anostomidae Leporinus moralesi Fowler, 1942 Fr native  Lisa (Spanish)  30.00 cm TL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 36801. 
Anostomidae Leporinus multifasciatus Cope, 1878 Fr native  Lisa (Spanish)   Known from the Amazon River basin (Ref. 6329). Also Ref. 36801.  No picture yet.
Anostomidae Leporinus striatus Kner, 1858 Fr native  Lisa (Spanish)  25.00 cm TL male/unsexed  Known from the Amazon River. 
Anostomidae Leporinus wolfei Fowler, 1940 Fr native  Lisa (Spanish)  30.00 cm TL male/unsexed  Known from the Ucayali and Amazon River basins (Ref. 36801).  No picture yet.
Anostomidae Leporinus y-ophorus Eigenmann, 1922 Fr native  Lisa (Spanish)   Knonw from the Amazon River. 
Characidae Leptagoniates steindachneri Boulenger, 1887 Fr native  Mojara (Spanish)  7.60 cm SL male/unsexed  Known from the Amazon River. 
Callichthyidae Lepthoplosternum altamazonicum Reis, 1997 Fr native   5.00 cm SL male/unsexed  Recorded from the Rio Amazonas (Ref. 26144).  No picture yet.
Callichthyidae Lepthoplosternum beni Reis, 1997 Fr native   5.00 cm SL male/unsexed  Known from the Madeira River basin (Ref. 37395). Also Ref. 56211. 
Callichthyidae Lepthoplosternum ucamara Reis & Kaefer, 2005 Fr native   4.55 cm SL male/unsexed  Known from the Pacaya-Samiria National Reserve, lower Rio Ucayali.  No picture yet.
Doradidae Leptodoras acipenserinus (Günther, 1868) Fr native  Pirillo (Spanish)  20.30 cm SL male/unsexed  Known from the Amazon river basin (Ref. 56896). Found in Keberos (Ref. 6868). 
Doradidae Leptodoras juruensis Boulenger, 1898 Fr native   28.80 cm SL male/unsexed  Known from the Amazon basin (Ref. 56896). Juveniles were collected by dragging net with canoes over large sand/silt shoals in the main channels of the Amazon River (Ref. 56896). 
Doradidae Leptodoras myersi Böhlke, 1970 Fr endemic  Pirillo (Spanish)  7.70 cm SL male/unsexed  Known only from the type series collected by trawling a swift flowing channel of the Amazon River near Iquitos (Ref. 56896). Also Ref. 37054. 
Dorosomatidae Lile stolifera (Jordan & Gilbert, 1882) Fr, Br, M native  Pelada (Spanish)  15.90 cm TL male/unsexed  Reported from Puerto Pizzaro (Ref. 96339). Also Ref. 188. 
Loricariidae Limatulichthys griseus (Eigenmann, 1909) Fr native   23.70 cm TL male/unsexed   
Auchenipteridae Liosomadoras morrowi Fowler, 1940 Fr native    Known from the Ucayali River basin (Ref. 37098). 
Loricariidae Loraxichthys lexa Salcedo, 2013 Fr native   4.90 cm SL male/unsexed  Found only in clear water tributaries of the Río Huallaga near Tingo María (725-780 m), Departament of Huánuco (Ref. 93320).  No picture yet.
Loricariidae Loricaria clavipinna Fowler, 1940 Fr native  Shitari (Spanish)  18.00 cm SL male/unsexed  Known from the Amazon River (Ref. 36389).  No picture yet.
Loricariidae Loricaria simillima Regan, 1904 Fr native  Shitari (Spanish)  26.40 cm SL male/unsexed  Known from the Amazon River (Ref. 36389). 
Loricariidae Loricariichthys cashibo (Eigenmann & Allen, 1942) Fr native  Shitari (Spanish)  13.00 cm male/unsexed  Known from the Amazon River basin (Ref. 36389).  No picture yet.
Loricariidae Loricariichthys chanjoo (Fowler, 1940) Fr native  Shitari (Spanish)  23.00 cm male/unsexed  Known from the Ucayali River basin (Ref. 36389).  No picture yet.
Loricariidae Loricariichthys hauxwelli Fowler, 1915 Fr native  Shitari (Spanish)  18.00 cm male/unsexed  Known from the Ampyiacu River basin (Ref. 36389).  No picture yet.
Loricariidae Loricariichthys stuebelii (Steindachner, 1882) Fr native  Shitari (Spanish)  19.00 cm SL male/unsexed  Known from the upper Amazon drainage, Huallaga River basin (Ref. 36389).  No picture yet.
Loricariidae Loricariichthys ucayalensis Regan, 1913 Fr native  Shitari (Spanish)  22.00 cm TL male/unsexed  Known from the upper Amazon drainage, Ucayali River basin (Ref. 36389). Also Ref. 6868.  No picture yet.
Engraulidae Lycengraulis batesii (Günther, 1868) Fr, Br native   30.00 cm TL male/unsexed   
Callichthyidae Megalechis picta (Müller & Troschel, 1849) Fr, Or native  Porthol rayado (Spanish), Shirui (Spanish)  17.00 cm SL male/unsexed  Occurs in the Amazon River and its tributaries and in Pacaya, Samiria and Huallaga Rivers (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Callichthyidae Megalechis thoracata (Valenciennes, 1840) Fr native   15.50 cm SL male/unsexed   
Trichomycteridae Megalocentor echthrus de Pinna & Britski, 1991 Fr native   8.79 cm SL male/unsexed  Known from the Rio Ucayali, Bagazan.  No picture yet.
Doradidae Megalodoras uranoscopus (Eigenmann & Eigenmann, 1888) Fr native  Rego rego (Spanish)  53.00 cm SL male/unsexed ;60.00 cm SL female   
Pimelodidae Megalonema amaxanthum Lundberg & Dahdul, 2008 Fr native   24.10 cm SL male/unsexed ;31.20 cm SL female  Known from the Amazon River basin (Ref. 79495).  No picture yet.
Pimelodidae Megalonema platycephalum Eigenmann, 1912 Fr native   30.00 cm TL male/unsexed   
Cichlidae Mesoheros festae (Boulenger, 1899) Fr native   25.00 cm TL male/unsexed  Found in Tumbes River (Ref. 36377). 
Cichlidae Mesonauta festivus (Heckel, 1840) Fr native   12.10 cm SL male/unsexed  Known from the Amazon Rver basin in Madre de Dios River drainage (Ref. 36377). 
Cichlidae Mesonauta mirificus Kullander & Silfvergrip, 1991 Fr native  Bufurqui (Spanish), Bujurqui (Spanish)  9.70 cm SL male/unsexed  Type locality: Departamento Loreto, Rio Napo, Cayapoza, small laguna on left bank island, NRM 20001 (holotype of Mesonauta mirificus, . Known from the Amazon River basin (Ref. 36377). 
Serrasalmidae Metynnis hypsauchen (Müller & Troschel, 1844) Fr native  Palometa (Spanish)  18.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Serrasalmidae Metynnis luna Cope, 1878 Fr native  Palometa (Spanish)  12.90 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 34077, 39031. 
Crenuchidae Microcharacidium geryi Zarske, 1997 Fr native   2.40 cm SL male/unsexed  Occurs in the Ucayali River basin (Ref. 37059).  No picture yet.
Characidae Microgenys lativirgata Pearson, 1927 Fr native  Mojarrita (Spanish), Mojarita (Spanish)  7.10 cm SL male/unsexed  Known from the Amazon River. Also Ref. 598.  No picture yet.
Characidae Microgenys weyrauchi Fowler, 1945 Fr native  Mojarrita (Spanish), Mojarita (Spanish)  2.80 cm SL male/unsexed  Known from the Amazon basin.  No picture yet.
Pseudopimelodidae Microglanis zonatus Eigenmann & Allen, 1942 Fr endemic   2.00 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 39418).  No picture yet.
Rivulidae Moema hellneri Costa, 2003 Fr native    Known from the Amazon basin in northern Peru (Ref. 50838). 
Rivulidae Moema kenwoodi Valdesalici, 2016 Fr native   4.41 cm SL male/unsexed ;3.68 cm SL female  Type locality of Moema kenwoodi, Dept. Madre de Dios, Tambopata temporary pool within forest, Manuripe river system, Madre de Dios river drainage, Amazonian basin. Known only from its type locality in southeastern Peru (Ref. 130458).  No picture yet.
Rivulidae Moema ortegai Costa, 2003 Fr native      No picture yet.
Rivulidae Moema pepotei Costa, 1993 Fr native   12.00 cm TL male/unsexed  Known from the Amazon River (Ref. 36579). 
Rivulidae Moema quiii Huber, 2003 Fr native    Known from the rio Madre de Dios drainage, Tambopata (Ref. 52556). 
Characidae Moenkhausia atahualpiana (Fowler, 1907) Fr native  Mojara (Spanish)   Known from the Amazon River.  No picture yet.
Characidae Moenkhausia ceros Eigenmann, 1908 Fr native  Mojara (Spanish)  5.00 cm TL male/unsexed  Known from the Amazon River. 
Characidae Moenkhausia collettii (Steindachner, 1882) Fr native  Mojara (Spanish) common (usually seen) 6.40 cm TL male/unsexed  Found in the Amazon River (Ref. 6329). Also Ref. 38376. 
Characidae Moenkhausia crisnejas Pearson, 1929 Fr native  Mojara (Spanish)  4.40 cm SL male/unsexed  Found in the Crisnejas River basin (Ref. 38376).  No picture yet.
Characidae Moenkhausia dichroura (Kner, 1858) Fr, Or native  Moenkhausia cola manchada (Spanish), Mojara (Spanish)  10.00 cm SL male/unsexed  Occurs in Marañón, Samiria and Huallaga Rivers. Exported as an aquarium fish (Ref. 9235). 
Characidae Moenkhausia lepidura (Kner, 1858) Fr native  Mojara (Spanish)  10.50 cm TL male/unsexed  Known from the Amazon River. 
Characidae Moenkhausia margitae Zarske & Géry, 2001 Fr endemic  Mojara (Spanish) fairly common (chances are about 50%) 6.40 cm SL male/unsexed  Found in the upper Amazon River basin (Ref. 38376). Rio Ucayali basin near Pucallpa (Ref. 38399).  No picture yet.
Characidae Moenkhausia mikia Marinho & Langeani, 2010 Fr native   7.83 cm SL male/unsexed  Known from the Ucayali drainage (Ref. 85074).  No picture yet.
Characidae Moenkhausia oligolepis (Günther, 1864) Fr, Or native  Tetra de vidrio (Spanish), Mojara (Spanish), Tetra espejo (Spanish), Glossy tetra (English)  10.00 cm SL male/unsexed  Occurs in the upper Amazon and around Iquitos. Exported as an aquarium fish (Ref. 9235). 
Characidae Moenkhausia ovalis (Günther, 1868) Fr native  Mojara (Spanish)  8.00 cm SL male/unsexed  Found in the Amazon River basin (Ref. 38376).  No picture yet.
Characidae Moenkhausia robertsi Géry, 1964 Fr native  Mojara (Spanish)  4.90 cm SL male/unsexed  Recorded from Iquitos, Upper Amazon. Also Ref. 26282.  No picture yet.
Characidae Moenkhausia simulata (Eigenmann, 1924) Fr native  Mojara (Spanish)  7.20 cm SL male/unsexed  Recorded from Rio Pachitea (Ref. 598) and the upper Amazon River basin (Ref. 38376). Also Ref. 55829. 
Polycentridae Monocirrhus polyacanthus Heckel, 1840 Fr, Or native  Pez hoja (Spanish), Barbeled leaf fish (English)  8.00 cm SL male/unsexed  Occurs in the Amazon River and its tributaries, Itaya River and Lake Moronacocha. Exported as an aquarium fish (Ref. 9235). Also Ref. 50082. 
Characidae Monotocheirodon drilos Menezes, Weitzman & Quagio-Grassiotto, 2013 Fr native   3.33 cm SL male/unsexed ;3.78 cm SL female  Found in the headwaters of Ríos Tambopata and Madre de Dios, Río Madre de Dios basin (Ref. 94699).  No picture yet.
Characidae Monotocheirodon kontos Menezes, Weitzman & Quagio-Grassiotto, 2013 Fr native   3.35 cm SL male/unsexed ;3.71 cm SL female  Found in the tributaries of the Río Madre de Dios basin, between 350 and 3,200 m of altitude (Ref. 94699).  No picture yet.
Mugilidae Mugil cephalus Linnaeus, 1758 Fr, Br, M native  Striped mullet (English), Lisa común (Spanish), Flathead grey mullet (English), Lisa rayada (Spanish)  100.00 cm SL male/unsexed  Type locality: San Lorenzo I. (holotype of Mugil rammelsbergii). (Ref. 26282). Also Ref. 2850, 5530. 
Mugilidae Mugil curema Valenciennes, 1836 Fr, Br, M native  Lisa plateada (Spanish)  91.00 cm TL male/unsexed   
Serrasalmidae Myloplus lobatus (Valenciennes, 1850) Fr native   24.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031).  No picture yet.
Serrasalmidae Myloplus rubripinnis (Müller & Troschel, 1844) Fr, Or native  Kuruhuara de aleta anal roja (Spanish), Palometa (Spanish), Palometa kuruhuara (Spanish)  41.50 cm TL male/unsexed  Occurs in Ucayali, Pacaya, Samiria and Huallaga Rivers. Exported as an aquarium fish (Ref. 9235). 
Serrasalmidae Myloplus schomburgkii (Jardine, 1841) Fr native   42.00 cm SL male/unsexed   
Serrasalmidae Mylossoma albiscopum (Cope, 1872) Fr native   24.20 cm SL male/unsexed  Type locality of Mylosomma albiscopus, lectotype, in rio Ambyiacu. Known from Rio Amazonas basin (Loreto) and Río Ucayali basin (Ucayali) (Ref. 117280).  No picture yet.
Serrasalmidae Mylossoma aureum (Spix & Agassiz, 1829) Fr native  Palometa (Spanish)  20.00 cm TL male/unsexed  Known from the Amazon River (Ref. 39031) in Loreto (Ref. 117280). 
Serrasalmidae Mylossoma duriventre (Cuvier, 1818) Fr native  Palometa (Spanish)  25.00 cm SL male/unsexed   
Heptapteridae Myoglanis koepckei Chang, 1999 Fr endemic   5.87 cm SL male/unsexed  Known only from the type locality in the Rio Nanay, a small tributary of the Rio Amazonas (Ref. 38033). Also Ref. 36914.  No picture yet.
Loricariidae Nannoptopoma spectabile (Eigenmann, 1914) Fr native   2.90 cm SL male/unsexed  Known from the Amazon (Ref. 84367).  No picture yet.
Loricariidae Nannoptopoma sternoptychum Schaefer, 1996 Fr native   3.30 cm SL male/unsexed  Type locality, Quebrada Mariposa at Cusco-Amazonico Lodge, Puerto Maldonado, Tambopata, Dpto. Madre de Dios, MUSM 4097 (holotype of Nannoptopoma sternoptychum, 3.32 cm SL, male) (Ref. 84367). Known from lowland reaches of the Amazon River and tributaries below 200 m elevation (Ref. 30778); in Madre de Dios (Ref. 84367). 
Lebiasinidae Nannostomus eques Steindachner, 1876 Fr, Or native  Pez lápiz de cola pardo (Spanish), Per lápiz (Spanish), Torpedo (Spanish)  5.00 cm TL male/unsexed  Occurs in the Amazon River and its tributaries. Exported as an aquarium fish (Ref. 9235). 
Lebiasinidae Nannostomus marginatus Eigenmann, 1909 Fr native   3.50 cm TL male/unsexed   
Lebiasinidae Nannostomus mortenthaleri Paepke & Arendt, 2001 Fr native   2.90 cm SL male/unsexed  Known from Nany River near Albarenga and apparently Tigre River near Santa Elena in Loreto Department (Ref. 37104). 
Lebiasinidae Nannostomus rubrocaudatus Zarske, 2009 Fr native   2.57 cm SL male/unsexed   
Lebiasinidae Nannostomus trifasciatus Steindachner, 1876 Fr, Or native  Pez lápiz (Spanish)  3.60 cm SL male/unsexed  Occurs in the Amazon River and its tributaries (Ref. 6329). Exported as an aquarium fish (Ref. 9235). Also Ref. 37104. 
Doradidae Nemadoras cristinae Sabaj Pérez, Arce H., Sousa & Birindelli, 2014 Fr native   12.39 cm SL male/unsexed  Known from the upper Amazonas circa Iquitos and río Santiago (tributary of Marañon); and Madeira basin from its mouth to rio Madre de Dios (Ref. 96153).  No picture yet.
Doradidae Nemadoras elongatus (Boulenger, 1898) Fr native  Pirillo (Spanish)  16.50 cm SL male/unsexed  Known from the Amazon River (Ref. 37054).  No picture yet.
Doradidae Nemadoras hemipeltis (Eigenmann, 1925) Fr native  Pirillo (Spanish)  16.30 cm SL male/unsexed  Known from the Rio Ucayali at Cantamana (Ref. 6868). Found in the Amazon River (Ref. 37054). 
Doradidae Nemadoras humeralis (Kner, 1855) Fr native  Pirillo (Spanish)  16.30 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Heptapteridae Nemuroglanis lanceolatus Eigenmann & Eigenmann, 1889 Fr native   3.81 cm SL male/unsexed  Known from the Ucayali River basin, a tributary of the Amazon River system (Ref. 55662).  No picture yet.
Atherinopsidae Odontesthes bonariensis (Valenciennes, 1835) Fr, Aq introduced   50.00 cm TL male/unsexed   
Atherinopsidae Odontesthes regia (Humboldt, 1821) Fr, Br, M native  Peruvian silverside (English), Pejerrey (Spanish)  18.30 cm TL male/unsexed 13.5 TL Known from Callao (Ref. 33128). 
Crenuchidae Odontocharacidium aphanes (Weitzman & Kanazawa, 1977) Fr native   1.65 cm SL male/unsexed  Known from the Amazon River (Ref. 37059). Recorded from the Solimões and Javari drainages (Ref. 13683). 
Characidae Odontostilbe ecuadorensis Bührnheim & Malabarba, 2006 Fr native   4.58 cm SL male/unsexed ;5.02 cm SL female    No picture yet.
Characidae Odontostilbe fugitiva Cope, 1870 Fr native  Mojara (Spanish)  4.40 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Salmonidae Oncorhynchus mykiss (Walbaum, 1792) Fr, Fi, Aq introduced   122 cm TL male/unsexed   
Cichlidae Oreochromis aureus (Steindachner, 1864) Fr, Br introduced   45.70 cm TL male/unsexed   
Cichlidae Oreochromis mossambicus (Peters, 1852) Fr, Br introduced   39.00 cm SL male/unsexed   
Cichlidae Oreochromis niloticus (Linnaeus, 1758) Fr, Br, Aq introduced   60.00 cm SL male/unsexed   
Cyprinodontidae Orestias agassizii Valenciennes, 1846 Fr native   7.00 cm TL male/unsexed   
Cyprinodontidae Orestias albus Valenciennes, 1846 Fr native   18.00 cm TL male/unsexed  Known form the Lake Titicaca (Ref. 50471). 
Cyprinodontidae Orestias crawfordi Tchernavin, 1944 Fr endemic   8.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias ctenolepis Parenti, 1984 Fr endemic   8.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias cuvieri Valenciennes, 1846 Fr, Fi native  Boga (Spanish) common (usually seen) 27.00 cm TL male/unsexed  Found in Lakes Titcaca and Arapa (Ref. 7273). Probably extinct (Ref. 27139) 
Cyprinodontidae Orestias elegans Garman, 1895 Fr endemic   10.00 cm TL male/unsexed  Known from the Santa Eulalia River (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias empyraeus Allen, 1942 Fr endemic   10.00 cm TL male/unsexed  Known from the Junin Lake and the upper Amazon River basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias forgeti Lauzanne, 1981 Fr native   12.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). 
Cyprinodontidae Orestias frontosus Cope, 1876 Fr native  Carache (Spanish)  15.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias gracilis Parenti, 1984 Fr native   5.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias gymnota Parenti, 1984 Fr endemic   8.00 cm TL male/unsexed  Known from the upper Amazon River basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias hardini Parenti, 1984 Fr endemic   4.50 cm TL male/unsexed  Known from Yanococha and Llacsha Lakes (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias imarpe Parenti, 1984 Fr native   7.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias incae Garman, 1895 Fr native   6.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias ispi Lauzanne, 1981 Fr native  Ispi (Spanish)  9.00 cm TL male/unsexed  Known from Lake Titicaca (Ref. 50471). 
Cyprinodontidae Orestias jussiei Valenciennes, 1846 Fr endemic   8.50 cm TL male/unsexed  Known from the upper Amazon River basin (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias lastarriae Philippi, 1876 Fr native    Found in Lakes Pucro and Misa, east of Lima (Ref. 42871).  No picture yet.
Cyprinodontidae Orestias luteus Valenciennes, 1846 Fr native   17.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias minimus Tchernavin, 1944 Fr native   3.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias minutus Tchernavin, 1944 Fr endemic   3.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias mooni Tchernavin, 1944 Fr endemic   4.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias mulleri Valenciennes, 1846 Fr endemic  Carache (Spanish)  4.50 cm TL male/unsexed  Known from the Lake Titcaca (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias multiporis Parenti, 1984 Fr endemic   10.00 cm TL male/unsexed  Known from the Lake Titicaca basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias mundus Parenti, 1984 Fr endemic   6.00 cm TL male/unsexed  Known from the upper Amazon River basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias olivaceus Garman, 1895 Fr native   7.50 cm TL male/unsexed  Known from the Lake Titicaca basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias pentlandii Valenciennes, 1846 Fr endemic   23.50 cm TL male/unsexed  Known from the Lake Titicaca and the upper Amazon River basin (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias polonorum Tchernavin, 1944 Fr endemic   14.50 cm TL male/unsexed  Known from the Junin Lake (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias puni Tchernavin, 1944 Fr endemic  Carache (Spanish)  15.00 cm TL male/unsexed  Known from the Titicaca basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias richersoni Parenti, 1984 Fr endemic   10.00 cm TL male/unsexed  Known from the Lake Titicaca basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias robustus Parenti, 1984 Fr endemic   7.00 cm TL male/unsexed  Known from the Lake Titicaca basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias silustani Allen, 1942 Fr endemic   10.00 cm TL male/unsexed  Known from the Lake Titicaca basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias taquiri Tchernavin, 1944 Fr endemic   3.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias tchernavini Lauzanne, 1981 Fr native   6.00 cm TL male/unsexed   
Cyprinodontidae Orestias tomcooni Parenti, 1984 Fr native   6.50 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias tschudii Castelnau, 1855 Fr native   20.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139. 
Cyprinodontidae Orestias tutini Tchernavin, 1944 Fr native   4.50 cm TL male/unsexed    No picture yet.
Cyprinodontidae Orestias uruni Tchernavin, 1944 Fr endemic   6.00 cm TL male/unsexed  Known from the Lake Titicaca (Ref. 50471). Also Ref. 27139.  No picture yet.
Cyprinodontidae Orestias ututo Parenti, 1984 Fr endemic   5.50 cm TL male/unsexed  Known from the Amazon River basin (Ref. 50471). Also Ref. 27139.  No picture yet.
Doradidae Ossancora asterophysa Birindelli & Sabaj Pérez, 2011 Fr native   16.80 cm TL male/unsexed  Known from the Amazonas basin. Recorded from río Ucayali (Ref. 92411).  No picture yet.
Doradidae Ossancora eigenmanni (Boulenger, 1895) Fr native   15.20 cm SL male/unsexed   
Doradidae Ossancora punctata (Kner, 1855) Fr native  Pirillo (Spanish)  11.30 cm SL male/unsexed   
Osteoglossidae Osteoglossum bicirrhosum (Cuvier, 1829) Fr, Or native  Arahuana (Spanish)  90.00 cm TL male/unsexed  Occurs in the Amazon, Ucayali and Marañon Rivers and adjoining lagoons. Exported as an aquarium fish (Ref. 9235). 
Characidae Othonocheirodus eigenmanni Myers, 1927 Fr native  Mojara (Spanish)  4.70 cm male/unsexed  Known from the Amazon River. 
Loricariidae Otocinclus batmani Lehmann A., 2006 Fr native   3.67 cm SL male/unsexed  Known from the two creeks emptying into the Río Amazonas near Iquitos in the upper Amazon River basin (Ref. 75892).  No picture yet.
Loricariidae Otocinclus cocama Reis, 2004 Fr, Or native   4.38 cm SL male/unsexed  Known from its type locality, in the quebrada Yanayacu, near Jenaro Herrera, Loreto. Has been in the aquarium trade since early 2001 and is quite common in the aquarium shops in Iquitos (Ref. 57860). 
Loricariidae Otocinclus huaorani Schaefer, 1997 Fr native   3.20 cm SL male/unsexed  Found in the Amazon River.  No picture yet.
Loricariidae Otocinclus macrospilus Eigenmann & Allen, 1942 Fr native   3.50 cm SL male/unsexed  Found in the Amazon River basin (Ref. 36885). Type locality: Río Morona, Upper Amazon, Dpto Loreto, Peru (Ref. 26282). 
Loricariidae Otocinclus vestitus Cope, 1872 Fr native   3.20 cm SL male/unsexed  Type locality: Tributaries of Río Ambyiacu [Ampiyacu] near Pebas, ca. 3°40'S, 71°45'W, Depto. Loreto, Peru (Ref. 26282). 
Loricariidae Otocinclus vittatus Regan, 1904 Fr native   3.30 cm TL male/unsexed   
Characidae Oxybrycon parvulus Géry, 1964 Fr native  Mojara (Spanish)  2.09 cm SL male/unsexed  Known from the Amazon River. 
Doradidae Oxydoras niger (Valenciennes, 1821) Fr native  Turushuqui (Spanish)  100.00 cm SL male/unsexed  Commercially threatened (Ref. 9084). 
Loricariidae Oxyropsis carinata (Steindachner, 1879) Fr native   7.60 cm SL male/unsexed  Known from the Amazon River (Ref. 36885). Type locality: Tributaries of the Amazon at the border of Peru (Ref. 26282).  No picture yet.
Loricariidae Oxyropsis wrightiana Eigenmann & Eigenmann, 1889 Fr native   5.60 cm SL male/unsexed  Known from the Amazon River (Ref. 36885).  No picture yet.
Sciaenidae Pachyurus gabrielensis Casatti, 2001 Fr native  Curbinata (Spanish)  14.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36888). 
Sciaenidae Pachyurus schomburgkii Günther, 1860 Fr, Br native   28.50 cm SL male/unsexed ;28.90 cm SL female  Known from the Amazon River basin (Ref. 36888). 
Loricariidae Panaqolus albivermis Lujan, Steele & Velasquez, 2013 Fr native   9.58 cm SL male/unsexed  Found in San Alejandro River, a tributary of Aguaytia River in the upper Ucayali watershed in central Peru (Ref. 93923).  No picture yet.
Loricariidae Panaqolus albomaculatus (Kanazawa, 1958) Fr native   12.40 cm SL male/unsexed  Collected from Amazonas, Caterpiza (Ref. 42939). 
Loricariidae Panaqolus changae (Chockley & Armbruster, 2002) Fr endemic   8.45 cm SL male/unsexed  Known from the ríos Itaya and Momon in the vicinity of Iquitos. Type locality, 11 km SSW center of Iquitos, río Amazonas drainage, río Itaya, Loreto (Ref. 42939). Also Ref. 36713. 
Loricariidae Panaqolus dentex (Günther, 1868) Fr native  Carachama (Spanish)  8.00 cm SL male/unsexed  Collected from Amazonas, Caterpiza (Ref. 42939). 
Loricariidae Panaqolus gnomus (Schaefer & Stewart, 1993) Fr native   7.10 cm SL male/unsexed  Collected from Amazonas, Caterpiza (Ref. 42939).  No picture yet.
Loricariidae Panaqolus nix Cramer & Rapp Py-Daniel, 2015 Fr native   11.22 cm SL male/unsexed  Known from the Río Tambopata, Madre de Dios drainage (Ref. 104707).  No picture yet.
Loricariidae Panaqolus nocturnus (Schaefer & Stewart, 1993) Fr native   14.39 cm SL male/unsexed  Collected from Amazonas, río Santiago at la Poza, río Marañon drainage, outside mouth of quebrada by airport (Ref. 42939).  No picture yet.
Loricariidae Panaqolus purusiensis (La Monte, 1935) Fr native   13.04 cm SL male/unsexed  Recorded from Río Curanja near confluence with Río Purús and at mouth with Río Purus in Ucayali (Ref. 104707).  No picture yet.
Loricariidae Panaque schaeferi Lujan, Hidalgo & Stewart, 2010 Fr native    Widely distributed in the main-channel habitats of the upper Amazon (Solimões) River basin (Ref. 85845). 
Cetopsidae Paracetopsis atahualpa Vari, Ferraris & de Pinna, 2005 Fr native    Known from rio Tumbes in northwestern Peru (Ref. 56045).  No picture yet.
Characidae Paracheirodon innesi (Myers, 1936) Fr, Or native  Mojarita (Spanish), Neon tetra (English), Piaba (English)  2.22 cm SL male/unsexed  Occurs in headwaters of the Amazon, Yarapa, Napo and Tigre Rivers. Exported as an aquarium fish (Ref. 9235). 
Characidae Paragoniates alburnus Steindachner, 1876 Fr native   6.00 cm TL male/unsexed  Found in the Amazon River (Ref. 38376). 
Loricariidae Parancistrus aurantiacus (Castelnau, 1855) Fr native  Carachama (Spanish)  19.30 cm SL male/unsexed  Known from the Ucayali River (Ref. 36713). Also Ref. 6868. 
Apteronotidae Parapteronotus hasemani (Ellis, 1913) Fr native   38.10 cm TL male/unsexed  Found in the Amazon River basin (Ref. 36886).  No picture yet.
Potamotrygonidae Paratrygon aiereba (Müller & Henle, 1841) Fr native  Raya (Spanish)  80.00 cm WD male/unsexed ;78.00 cm WD female  Occurs in the Amazon basin. 
Characidae Parecbasis cyclolepis Eigenmann, 1914 Fr native  Mojara (Spanish)  8.00 cm SL male/unsexed    No picture yet.
Heptapteridae Pariolius armillatus Cope, 1872 Fr native  Bagre (Spanish)  3.20 cm SL male/unsexed  Known form the Amazon basin. Also Ref. 6868, 36914. 
Apteronotidae Pariosternarchus amazonensis Albert & Crampton, 2006 Fr native   15.20 cm SL male/unsexed  Collected from the Rio Amazonas, near Iquitos (Ref. 57730).  No picture yet.
Parodontidae Parodon buckleyi Boulenger, 1887 Fr native  Julilla (Spanish)  15.00 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 38267. 
Parodontidae Parodon pongoensis (Allen, 1942) Fr native  Julilla (Spanish)  10.40 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 38267. 
Loricariidae Peckoltia bachi (Boulenger, 1898) Fr native  Carachama (Spanish)  14.00 cm TL male/unsexed  Found throughout the upper Amazon and its tributaries (Ref. 77026). Occurs in the Ucayali River basin (Ref. 36713). Also Ref. 6868. 
Loricariidae Peckoltia furcata (Fowler, 1940) Fr endemic  Carachama (Spanish)  9.20 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 36713). Also Ref. 6868.  No picture yet.
Loricariidae Peckoltia pankimpuju (Lujan & Chamon, 2008) Fr native   13.01 cm SL male/unsexed  Known only from a marginal right bank boulder field at the head of the Pongo de Manseriche in the middle Marañon River (Ref. 79810). 
Pristigasteridae Pellona altamazonica Cope, 1872 Fr native  Sardina (Spanish)  3.60 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Pristigasteridae Pellona castelnaeana Valenciennes, 1847 Fr, Br native   80.00 cm FL male/unsexed  Known from the Amazon River basin (Ref. 50591). 
Pristigasteridae Pellona flavipinnis (Valenciennes, 1837) Fr, Br native   73.00 cm TL male/unsexed   
Characidae Petitella georgiae Géry & Boutière, 1964 Fr native   3.86 cm SL male/unsexed  Found in the Amazon River basin (Ref. 38376). 
Characidae Phenacogaster capitulata Lucena & Malabarba, 2010 Fr native   3.96 cm SL male/unsexed  Known only from its type locality, Rio Neshuya, sistema do Rio Ucayali, MUSM 20424 (holotype of Phenacogaster capitulatus, 3.87 cm SL) (Ref. 84092). 
Characidae Phenacogaster pectinata (Cope, 1870) Fr native   4.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36811). Also Ref. 598.  No picture yet.
Heptapteridae Phenacorhamdia nigrolineata Zarske, 1998 Fr endemic   3.80 cm SL male/unsexed  Known from Ucayali River basin (Ref. 36914).  No picture yet.
Pimelodidae Phractocephalus hemioliopterus (Bloch & Schneider, 1801) Fr, Or native  Pez torre (Spanish), Pejje torre (Spanish)  135 cm TL male/unsexed  Occurs in Ucayali, Marañon, Samiria and Huallaga Rivers. Exported as an aquarium fish (Ref. 9235). 
Doradidae Physopyxis ananas Sousa & Rapp Py-Daniel, 2005 Fr native   2.20 cm SL male/unsexed    No picture yet.
Doradidae Physopyxis lyra Cope, 1872 Fr native  Pirillo (Spanish)  3.50 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Characidae Piabarchus analis (Eigenmann, 1914) Fr native   4.90 cm SL male/unsexed    No picture yet.
Lebiasinidae Piabucina elongata Boulenger, 1887 Fr native  Urquisho (Spanish)  14.30 cm SL male/unsexed    No picture yet.
Iguanodectidae Piabucus melanostoma Holmberg, 1891 Fr native  Mojarita boca negra (Spanish)  11.50 cm SL male/unsexed  Known from the Madeira River basin (Ref. 38383).  No picture yet.
Serrasalmidae Piaractus brachypomus (Cuvier, 1818) Fr, Fi, Aq native  Paco (Spanish)  88.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Heptapteridae Pimelodella buckleyi (Boulenger, 1887) Fr native   16.00 cm TL male/unsexed  Known from the Ambyiacu River basin (Ref. 36914).  No picture yet.
Heptapteridae Pimelodella cristata (Müller & Troschel, 1849) Fr native  Cunshi (Spanish)  34.00 cm SL male/unsexed  Found in the Amazon basin. 
Heptapteridae Pimelodella cyanostigma (Cope, 1870) Fr endemic  Cunshi (Spanish)   Known from the Ampyiacu River basin (Ref. 36914). Type locality: Pebas , Peru (Ref. 26282, 6868).  No picture yet.
Heptapteridae Pimelodella gracilis (Valenciennes, 1835) Fr native  Cunshi (Spanish)  18.00 cm SL male/unsexed  Found in the tributaries of Amazon (Ref. 6329). Also Ref. 36914. 
Heptapteridae Pimelodella hartwelli Fowler, 1940 Fr endemic  Cunshi (Spanish)  12.50 cm TL male/unsexed  Known from the Ucayali River basin (Ref. 36914). Type locality: Contamana, Río Ucayali basin, Peru (Ref. 26282). 
Heptapteridae Pimelodella hasemani Eigenmann, 1917 Fr native  Cunshi (Spanish)  8.10 cm TL male/unsexed    No picture yet.
Heptapteridae Pimelodella montana Allen, 1942 Fr endemic  Cunshi (Spanish)  9.30 cm SL male/unsexed  Known from the upper Marañon River basin (Ref. 36914). Type locality: Río Huallaga, Huánuco, Peru (Ref. 26282, 6868). 
Heptapteridae Pimelodella ophthalmica (Cope, 1878) Fr endemic   14.50 cm TL male/unsexed  Known from the Upper Amazon River basin (Ref. 36914).  No picture yet.
Heptapteridae Pimelodella peruana Eigenmann & Myers, 1942 Fr endemic   5.20 cm TL male/unsexed  Known from the Ucayali River basin (Ref. 36914). Type locality: Inahuaya, Río Ucayali, Peru (Ref. 6868, 26282).  No picture yet.
Heptapteridae Pimelodella peruensis Fowler, 1915 Fr endemic  Cunshi (Spanish)  5.20 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36914). Also Ref. 6868.  No picture yet.
Heptapteridae Pimelodella roccae Eigenmann, 1917 Fr native   18.20 cm TL male/unsexed  Known from the Urubamba River basin (Ref. 36914). Type locality: Lower Urubamba Valley, Peru (Ref. 6868, 26282).  No picture yet.
Heptapteridae Pimelodella yuncensis Steindachner, 1902 Fr endemic  Bagre (Spanish)  4.80 cm TL male/unsexed  Known from Jequetepeque River basin (Ref. 36914). Type locality: Pecasmayo, northern Peru (Ref. 26282, 6868).  No picture yet.
Pimelodidae Pimelodina flavipinnis Steindachner, 1876 Fr, Fi native  Cunshi (Spanish)  39.00 cm SL male/unsexed  Occurs in the Amazon river, from Pucallpa downwards (Ref. 6868). 
Pimelodidae Pimelodus altissimus Eigenmann & Pearson, 1942 Fr native    Type locality: Río Ucayali near Orellana, Amazon system, Peru (Ref. 26282, 6868).  No picture yet.
Pimelodidae Pimelodus blochii Valenciennes, 1840 Fr native   35.00 cm TL male/unsexed   
Pimelodidae Pimelodus jivaro Eigenmann & Pearson, 1942 Fr native    Known from the Amazon River basin (Ref. 36506). Type locality: Rio Morona, Peru (Ref. 6868).  No picture yet.
Pimelodidae Pimelodus ornatus Kner, 1858 Fr, Or native  Cunchi (Spanish), Cunshi (Spanish)  38.50 cm SL male/unsexed  Occurs in the Amazon and Nanay River (near Iquitos). Exported as an aquarium fish (Ref. 9235). 
Pimelodidae Pimelodus pictus Steindachner, 1876 Fr, Or native  Cunchi (Spanish), Cunshi (Spanish)  11.00 cm TL male/unsexed  Occurs in the Amazon, Ucayali, Marañon and Samiria Rivers (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Pimelodidae Pinirampus pirinampu (Spix & Agassiz, 1829) Fr, Or native  Mota común (Spanish), Bagre (Spanish), Mota (Spanish), Mota blanca (Spanish), Long finned cat (English)  120 cm TL male/unsexed  Occurs in Ucayali, Marañón, Pacaya, Samiria and Huallaga Rivers (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Sciaenidae Plagioscion auratus (Castelnau, 1855) Fr native  Curbinata (Spanish)  34.60 cm SL male/unsexed  Type locality, Río Ucayali, Amazon basin, MNHN 7622 (holotype of Johnius auratus) (Ref. 36888). 
Sciaenidae Plagioscion montei Soares & Casatti, 2000 Fr native   34.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36888). 
Sciaenidae Plagioscion squamosissimus (Heckel, 1840) Fr native  Curbinata (Spanish)  80.00 cm TL male/unsexed  Recorded as Plagioscion squamosissimus iquitensis in Iquitos, Amazon system, NE Peru (Ref. 36888). Also Ref. 4537. 
Loricariidae Planiloricaria cryptodon (Isbrücker, 1971) Fr native  Shitari (Spanish)  21.50 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 36389). 
Doradidae Platydoras costatus (Linnaeus, 1758) Fr, Or native  Rego rego (Spanish), Chocolate doradid (English)  24.00 cm SL male/unsexed  Occurs in Ucayali, Marañon, Samiria and Huallaga Rivers. Exported as an aquarium fish (Ref. 9235). 
Doradidae Platydoras hancockii (Valenciennes, 1840) Fr, Or native  Doras (Spanish), Bagre (Spanish), Rego-Rego (Spanish), Hancock's doradid (English)  15.00 cm TL male/unsexed  Occurs in Marañon, Pacaya and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Pimelodidae Platysilurus mucosus (Vaillant, 1880) Fr, Fi, Or native  Zungarito barbatus (Spanish), Bagre (Spanish), Mota (Spanish), Swallowtail pimeloid (Spanish)  20.00 cm SL male/unsexed  Occurs in the Amazon and Nanay Rivers (Ref. 6329). 
Pimelodidae Platystomatichthys sturio (Kner, 1858) Fr, Or native  Pez esturido (Spanish), Acha cubo (Spanish), Sturion (Spanish)  40.00 cm TL male/unsexed  Occurs in Napo, Marañón and Huallaga Rivers (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Apteronotidae Platyurosternarchus macrostoma (Günther, 1870) Fr native   40.00 cm TL male/unsexed  Found in the Amazon River basin (Ref. 36886). 
Trichomycteridae Plectrochilus diabolicus (Myers, 1927) Fr native   6.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39970).  No picture yet.
Trichomycteridae Plectrochilus machadoi Miranda Ribeiro, 1917 Fr native   9.30 cm male/unsexed  Known from the Amazon River basin (Ref. 39970).  No picture yet.
Potamotrygonidae Plesiotrygon nana Carvalho & Ragno, 2011 Fr native   24.70 cm WD male/unsexed    No picture yet.
Poeciliidae Poecilia reticulata Peters, 1859 Fr introduced   5.00 cm SL male/unsexed ;6.00 cm SL female   
Crenuchidae Poecilocharax weitzmani Géry, 1965 Fr native   4.00 cm TL male/unsexed   
Apteronotidae Porotergus duende de Santana & Crampton, 2010 Fr native   18.40 cm TL male/unsexed ;10.40 cm TL female    No picture yet.
Trichomycteridae Potamoglanis hasemani (Eigenmann, 1914) Fr native   1.80 cm male/unsexed  Known from the Amazon River basin (Ref. 39970).  No picture yet.
Curimatidae Potamorhina altamazonica (Cope, 1878) Fr native  Yahuarachi (Spanish)  27.00 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). 
Curimatidae Potamorhina latior (Spix & Agassiz, 1829) Fr native  Yahuarachi (Spanish)  24.00 cm SL male/unsexed  Known from the Amazon River (Ref. 35935, 38013). 
Curimatidae Potamorhina pristigaster (Steindachner, 1876) Fr native  Yahuarachi (Spanish)  21.90 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). Also Ref. 38013.  No picture yet.
Belonidae Potamorrhaphis guianensis (Jardine, 1843) Fr native   29.10 cm TL male/unsexed   
Potamotrygonidae Potamotrygon falkneri Castex & Maciel, 1963 Fr native  Raya de agua dulce (Spanish)  60.00 cm WD male/unsexed  Known from the Amazon basin. 
Potamotrygonidae Potamotrygon motoro (Müller & Henle, 1841) Fr, Or native  Raya (Spanish), Raya amazónica (Spanish), Raya motoro (Spanish), Stingrays (English)  50.00 cm WD male/unsexed  Found mainly in Ucayali and Marañon Rivers and adjoining lagoons. Exported as an aquarium fish (Ref. 9235). 
Potamotrygonidae Potamotrygon tatianae Silva & Carvalho, 2011 Fr native   36.20 cm WD male/unsexed  Type locality, Known from Río Madre de Díos, municipal district of Boca Manu, upper Amazon basin, state of Madre de Dios (Ref. 86911).  No picture yet.
Potamotrygonidae Potamotrygon tigrina Carvalho, Sabaj Pérez & Lovejoy, 2011 Fr native    Found in Río Nanay in the upper Amazon basin (Ref. 86809).  No picture yet.
Characidae Priocharax pygmaeus Weitzman & Vari, 1987 Fr native   1.65 cm SL male/unsexed  Known from the Río Ucayali basin in Loreto (Ref. 96862).  No picture yet.
Characidae Prionobrama filigera (Cope, 1870) Fr native   6.00 cm TL male/unsexed  Found in the Amazon River (Ref. 38376). 
Pristigasteridae Pristigaster cayana Cuvier, 1829 Fr, Br native   14.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 50591). 
Pristidae Pristis pectinata Latham, 1794 Fr, Br, M native  Pez rastrillo (Spanish)  760 cm TL male/unsexed   
Prochilodontidae Prochilodus nigricans Spix & Agassiz, 1829 Fr native  Boquichico (Quechua), Boquichico (Spanish)  48.50 cm SL male/unsexed ;52.50 cm SL female  Known from the Amazon River (Ref. 37057). 
Characidae Prodontocharax alleni Böhlke, 1953 Fr native  Mojarita (Spanish)  4.44 cm SL male/unsexed  Known from the Amazon and Ucayali River basins (Ref. 37055).  No picture yet.
Characidae Prodontocharax melanotus Pearson, 1924 Fr native  Mojarita (Spanish)  4.84 cm SL male/unsexed  Known from the Amazon River.  No picture yet.
Pinguipedidae Prolatilus jugularis (Valenciennes, 1833) Fr, Br, M native  Rollizo (Spanish)  40.00 cm TL male/unsexed  From Huacho southwards. 
Characidae Protocheirodon pi (Vari, 1978) Fr native   3.10 cm SL male/unsexed   
Curimatidae Psectrogaster amazonica Eigenmann & Eigenmann, 1889 Fr native  Chio chio (Spanish)  19.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 38013). Also Ref. 34107. 
Curimatidae Psectrogaster essequibensis (Günther, 1864) Fr native   16.90 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 34107, 38013. 
Curimatidae Psectrogaster rutiloides (Kner, 1858) Fr native  Chio chio (Spanish)  17.80 cm SL male/unsexed 9.31 SL Known from the Amazon River (Ref. 38013). Also Ref. 34107. 
Anostomidae Pseudanos trimaculatus (Kner, 1858) Fr, Or native  Anostomus de tres manchas (Spanish), Lisa (Spanish)  18.80 cm TL male/unsexed  Occurs in the Amazon River and its tributaries (Ref. 6329). Exported as an aquarium fish (Ref. 9235). Also Ref. 36801, 91907. 
Auchenipteridae Pseudepapterus hasemani (Steindachner, 1915) Fr native  Bagre (Spanish)  9.90 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37098).  No picture yet.
Aspredinidae Pseudobunocephalus amazonicus (Mees, 1989) Fr native   4.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Aspredinidae Pseudobunocephalus bifidus (Eigenmann, 1942) Fr native   4.30 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695).  No picture yet.
Aspredinidae Pseudobunocephalus quadriradiatus (Mees, 1989) Fr native   3.21 cm SL male/unsexed  Known from the upper Amazon River basin (Ref. 36695).  No picture yet.
Curimatidae Pseudocurimata peruana (Eigenmann, 1922) Fr native   12.70 cm SL male/unsexed  Found in Rio Chira and Rio Piura (Ref. 13243). Also Ref. 38013.  No picture yet.
Curimatidae Pseudocurimata troschelii (Günther, 1860) Fr native   15.50 cm SL male/unsexed  Found in Rio Zarumilla and Rio Tumbes (Ref. 13243). Also Ref. 38013. 
Loricariidae Pseudohemiodon lamina (Günther, 1868) Fr native  Shitari (Spanish)  15.90 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36389). 
Pimelodidae Pseudoplatystoma fasciatum (Linnaeus, 1766) Fr, Or native  Doncella (Spanish), Tiger shovelnose catfish (English)  105 cm SL male/unsexed  Occurs in the Amazon River and its tributaries in Peru (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Pimelodidae Pseudoplatystoma tigrinum (Valenciennes, 1840) Fr, Or native  Tigre zúngaro (Spanish)  130 cm TL male/unsexed  Occurs in the Amazon River and its tributaries. Exported as an aquarium fish (Ref. 9235). 
Poeciliidae Pseudopoecilia festae (Boulenger, 1898) Fr native   3.50 cm TL male/unsexed ;4.50 cm female   
Loricariidae Pseudorinelepis genibarbis (Valenciennes, 1840) Fr native  Carachama negro (Spanish), Carachama sin costilla (Spanish)  35.60 cm SL male/unsexed  Known from the Amazon River and its major tributaries ( Rios Marañon, Napo and Ucayali). Also Ref. 6868, 30773, 33317, 36817. 
Trichomycteridae Pseudostegophilus nemurus (Günther, 1869) Fr native   15.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 39970). Type locality: Upper Amazon; Rio Mamore (Ref. 6868). 
Belonidae Pseudotylosurus angusticeps (Günther, 1866) Fr native  Pez aguja (Spanish)  29.80 cm SL male/unsexed  Known from the Amazon River. 
Belonidae Pseudotylosurus microps (Günther, 1866) Fr native  Pez aguja (Spanish)  44.00 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Aspredinidae Pterobunocephalus dolichurus (Delsman, 1941) Fr native   7.33 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Doradidae Pterodoras granulosus (Valenciennes, 1821) Fr native  Rego rego (Spanish)  68.00 cm SL male/unsexed ;90.10 cm SL female   
Cichlidae Pterophyllum scalare (Schultze, 1823) Fr, Or native  Scalare (Spanish), Pez angel (Spanish)  10.50 cm TL male/unsexed  Found along Ucayali, Amazon River basin (Ref. 36377). Occurs in Pacaya, Nanay (near Iquitos) and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Loricariidae Pterosturisoma microps (Eigenmann & Allen, 1942) Fr native  Shitari (Spanish)  16.10 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36389). 
Loricariidae Pterygoplichthys gibbiceps (Kner, 1854) Fr native   50.00 cm TL male/unsexed  Known from the Amazon basin (Ref. 6329). 
Loricariidae Pterygoplichthys pardalis (Castelnau, 1855) Fr native  Cachpas (Spanish), Cachga (Spanish), Cajas (Spanish), Carachama (Spanish), Cascudo (Spanish), Vieja (Spanish)  57.80 cm TL male/unsexed  Known from the Amazon river (Ref. 6329). 
Loricariidae Pterygoplichthys punctatus (Kner, 1854) Fr native  Carachama (Spanish)  28.50 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). 
Loricariidae Pterygoplichthys scrophus (Cope, 1874) Fr native   27.50 cm SL male/unsexed  Known from Rio Amazonas basin, Rio Marañon and Rio Ucayali drainages (Ref. 26660). 
Loricariidae Pterygoplichthys weberi Armbruster & Page, 2006 Fr native   19.69 cm SL male/unsexed  Found in Yurimaguas creeks in Loreto (Ref. 75871). 
Serrasalmidae Pygocentrus nattereri Kner, 1858 Fr native  Paña (Spanish)  50.00 cm SL male/unsexed  Also Ref. 1672. 
Lebiasinidae Pyrrhulina australis Eigenmann & Kennedy, 1903 Fr native  Urquisho (Spanish)  5.00 cm SL male/unsexed  Known from the Amazon River. 
Lebiasinidae Pyrrhulina beni Pearson, 1924 Fr native  Urquisho (Spanish)  5.00 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 37104.  No picture yet.
Lebiasinidae Pyrrhulina brevis Steindachner, 1876 Fr native  Urquisho (Spanish)  7.00 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 37104. 
Lebiasinidae Pyrrhulina eleanorae Fowler, 1940 Fr native  Urquisho (Spanish)  7.50 cm SL male/unsexed  Known from the Amazon River. 
Lebiasinidae Pyrrhulina laeta (Cope, 1872) Fr native  Urquisho (Spanish)  7.60 cm SL male/unsexed   
Lebiasinidae Pyrrhulina obermulleri Myers, 1926 Fr native  Urquisho (Spanish)  6.00 cm SL male/unsexed  Known from the Amazon River. 
Lebiasinidae Pyrrhulina semifasciata Steindachner, 1876 Fr native  Urquisho (Spanish)  7.00 cm SL male/unsexed  Found in the Amazon basin. 
Lebiasinidae Pyrrhulina spilota Weitzman, 1960 Fr native  Urquisho (Spanish)  7.00 cm SL male/unsexed  Known from the Amazon River. 
Lebiasinidae Pyrrhulina vittata Regan, 1912 Fr native  Urquisho (Spanish)  3.50 cm SL male/unsexed   
Lebiasinidae Pyrrhulina zigzag Zarske & Géry, 1997 Fr native   3.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 37104). Type locality, creek on road from Campo-Verde to Nueva Requena, near Pucallpa, Loreto Dept. (Ref. 26282). 
Sternopygidae Rhabdolichops caviceps (Fernández-Yépez, 1968) Fr native   31.00 cm TL male/unsexed    No picture yet.
Sternopygidae Rhabdolichops troscheli (Kaup, 1856) Fr native   49.00 cm TL male/unsexed  Found in the Amazon River (Ref. 39524).  No picture yet.
Loricariidae Rhadinoloricaria bahuaja (Chang & Castro, 1999) Fr native   16.40 cm SL male/unsexed  Known from the Madre de Dios basin, including the Manu, Las Piedras, Tambopata and Heath rivers, and in the upper Rio Purus, Ucayali department.  No picture yet.
Loricariidae Rhadinoloricaria macromystax (Günther, 1869) Fr native  Shitari (Spanish)  14.20 cm SL male/unsexed  Type locality of Rhadinoloricaria macromystax, upper Amazon River (Ref. 36389, 124527). Also Ref. 6868. 
Loricariidae Rhadinoloricaria ommation (Nijssen & Isbrücker, 1988) Fr native   9.80 cm SL male/unsexed  Found in the upper Amazon drainage, lower Marañon River (Ref. 36389). Also Ref. 27116.  No picture yet.
Loricariidae Rhadinoloricaria rhami (Isbrücker & Nijssen, 1983) Fr native  Carachama (Spanish)  12.70 cm SL male/unsexed  Found in the Amazon River (Ref. 36389). Known from Río Huacamayo, ca. 9°S, 75°29'W, ca. 8 km northeast of Aguaytia village, Coronel Portillo Prov., Peru (Ref. 26282).  No picture yet.
Heptapteridae Rhamdella montana Eigenmann, 1913 Fr endemic  Bagre (Spanish)  3.70 cm SL male/unsexed  Known from the Ucayali River basin (Ref. 36914). Type locailty: brook in highlands, southeast of Tarma, Queta, Peru (Ref. 6868).  No picture yet.
Heptapteridae Rhamdia muelleri (Günther, 1864) Fr native   20.80 cm SL male/unsexed   
Heptapteridae Rhamdia quelen (Quoy & Gaimard, 1824) Fr native  Bagre (Spanish)  61.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 6329). Occurs in the tributary of Lake Titicaca in the Peruvian Andes (Ref. 6868). Reported from the Eten River basin (Ref. 36914). Also Ref. 26543. 
Heptapteridae Rhamdia xetequepeque Silfvergrip, 1996 Fr endemic   7.20 cm SL male/unsexed  Known from Jequetepeque River basin (Ref. 36914). Type locality: Jequetepeque R., just west of Chilete, 6°19.9'S, 78°25.9'W, Peru (Ref. 26282). 
Rhamphichthyidae Rhamphichthys lineatus Castelnau, 1855 Fr native   54.00 cm TL male/unsexed  Found in the Ucayali River basin (Ref. 36685).  No picture yet.
Rhamphichthyidae Rhamphichthys marmoratus Castelnau, 1855 Fr native   65.00 cm TL male/unsexed  Found in theUcayali River basin (Ref. 36685).  No picture yet.
Rhamphichthyidae Rhamphichthys pantherinus Castelnau, 1855 Fr native   55.00 cm SL male/unsexed    No picture yet.
Cynodontidae Rhaphiodon vulpinus Spix & Agassiz, 1829 Fr native  Chambira-challua (Spanish)  80.00 cm SL male/unsexed   
Doradidae Rhinodoras boehlkei Glodek, Whitmire & Orcés V., 1976 Fr native   17.00 cm TL male/unsexed  Known from the Amazon River (Ref. 37054). 
Loricariidae Rhinotocinclus isabelae Reis & Lehmann, 2022 Fr native   1.90 cm SL male/unsexed  Type locality of Rhinotocinclus isabelae from Río Nanay, between Puerto Almendra and Tarapoto, Iquitos, Loreto, Peru, MUSM 69737. Known from two localities near Iquitos, Loreto, Peru, one in the nearby Río Nanay and other in the Río Tigre (Ref. 128924).  No picture yet.
Haemulidae Rhonciscus bayanus (Jordan & Evermann, 1898) Fr native  Gruñidor (Spanish)  51.00 cm TL male/unsexed   
Anostomidae Rhytiodus argenteofuscus Kner, 1858 Fr native  Lisa (Spanish)  32.00 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 36801. 
Anostomidae Rhytiodus microlepis Kner, 1858 Fr native  Lisa (Spanish)  33.20 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 36801. 
Loricariidae Rineloricaria lanceolata (Günther, 1868) Fr native  Shitari (Spanish)  12.30 cm TL male/unsexed  Found in the Amazon River (Ref. 36389). 
Loricariidae Rineloricaria morrowi Fowler, 1940 Fr native  Shitari (Spanish)  16.50 cm male/unsexed  Known from the Ucayali River basin (Ref. 36389). 
Loricariidae Rineloricaria wolfei Fowler, 1940 Fr native  Shitari (Spanish)  14.90 cm male/unsexed  Known from the Ucayali River basin (Ref. 36389).  No picture yet.
Characidae Roeboides affinis (Günther, 1868) Fr native  Denton (Spanish)  11.00 cm SL male/unsexed  Type locality, Rio Huallaga (Ref. 34414). Also Ref. 36811. 
Characidae Roeboides dispar Lucena, 2001 Fr native   8.11 cm SL male/unsexed    No picture yet.
Characidae Roeboides myersii Gill, 1870 Fr native  Denton (Spanish)  22.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 36811). 
Parodontidae Saccodon wagneri Kner, 1863 Fr native   10.10 cm SL male/unsexed  Found in northernmost coastal basins (Ref. 38267). 
Bryconidae Salminus hilarii Valenciennes, 1850 Fr native  Sábalo (Spanish)  50.00 cm SL male/unsexed   
Salmonidae Salmo trutta Linnaeus, 1758 Fr introduced   140 cm SL male/unsexed   
Salmonidae Salvelinus fontinalis (Mitchill, 1814) Fr introduced   86.00 cm SL male/unsexed   
Salmonidae Salvelinus namaycush (Walbaum, 1792) Fr introduced   150 cm TL male/unsexed   
Cichlidae Satanoperca jurupari (Heckel, 1840) Fr, Or native   26.00 cm SL male/unsexed ;23.30 cm SL female  Known from the Amazon River basin (Ref. 36377). Occurs in Ucayali, Marañón, Pacaya and Samiria Rivers and their adjoining lagoons. Exported as an aquarium fish (Ref. 9235). 
Anostomidae Schizodon fasciatus Spix & Agassiz, 1829 Fr native  Lisa (Spanish)  40.00 cm TL male/unsexed  Known from the Amazon River. 
Trichomycteridae Schultzichthys bondi (Myers, 1942) Fr native   3.65 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39970).  No picture yet.
Scoloplacidae Scoloplax dicra Bailey & Baskin, 1976 Fr native   1.38 cm SL male/unsexed    No picture yet.
Characidae Scopaeocharax atopodus (Böhlke, 1958) Fr native  Mojarita (Spanish)  2.20 cm SL male/unsexed  Found in the middle and upper Huallaga River basin (Ref. 38597). Known from the Amazon River (Ref. 6329).  No picture yet.
Characidae Scopaeocharax rhinodus (Böhlke, 1958) Fr native  Mojarita (Spanish)  2.96 cm SL male/unsexed  Found in the middle and upper Huallaga River basin (Ref. 38597). Known from the Amazon River (Ref. 6329).  No picture yet.
Prochilodontidae Semaprochilodus insignis (Jardine, 1841) Fr, Or native  Boquichico (Spanish), Yahuarachi (Spanish)  22.00 cm SL male/unsexed ;29.50 cm SL female  Occurs in the Amazon river (Ref. 6329). Exported as an aquarium fish (Ref. 9235). Also Ref. 37057. 
Serrasalmidae Serrasalmus compressus Jégu, Leão & Santos, 1991 Fr native   19.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Serrasalmidae Serrasalmus elongatus Kner, 1858 Fr native  Paña (Spanish)  30.00 cm TL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Serrasalmidae Serrasalmus humeralis Valenciennes, 1850 Fr native   20.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Serrasalmidae Serrasalmus maculatus Kner, 1858 Fr native  Paña (Spanish)  26.40 cm TL male/unsexed ;34.50 cm TL female   
Serrasalmidae Serrasalmus rhombeus (Linnaeus, 1766) Fr native  Paña (Spanish)  41.50 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39031). 
Serrasalmidae Serrasalmus sanchezi Géry, 1964 Fr native  Paña (Spanish)  11.40 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Recorded from the Ucayali River basin (Ref. 39031). 
Serrasalmidae Serrasalmus serrulatus (Valenciennes, 1850) Fr native  Paña (Spanish)  19.00 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 39031. 
Pimelodidae Sorubim elongatus Littmann, Burr, Schmidt & Isern, 2001 Fr, Fi native  Paleta delgada (Spanish), Slender shovelnose catfish (English)  32.20 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36506). During the dry season, juveniles may be abundant with at least 20 individuals captured per seine haul (Ref. 40631). 
Pimelodidae Sorubim lima (Bloch & Schneider, 1801) Fr, Or native  Shiripira (Spanish)  54.20 cm TL male/unsexed  Occurs in the Amazon River and its tributaries, Ucayali and Marañon Rivers and adjoining lagoons (Ref. 6329). Exported as an aquarium fish (Ref. 9235). Also Ref. 26543. 
Pimelodidae Sorubim maniradii Littmann, Burr & Buitrago-Suarez, 2001 Fr native   25.60 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36506).  No picture yet.
Pimelodidae Sorubimichthys planiceps (Spix & Agassiz, 1829) Fr, Or native  Achacubo (Spanish), Shovelnose catfish (English)  150 cm SL male/unsexed  Occurs in Ucayali and Marañon Rivers (Ref. 6329). Exported as an aquarium fish (Ref. 9235). 
Loricariidae Spatuloricaria puganensis (Pearson, 1937) Fr native  Shitari (Spanish)  22.00 cm male/unsexed  Known from the Marañon River basin (Ref. 36389). 
Auchenipteridae Spinipterus acsi Akama & Ferraris, 2011 Fr native   3.20 cm SL male/unsexed  Type locality, Depto. Loreto, Prov. Maynas. Cano 'Santa Rita' (right bank tributary of R. Nanay), 3.32 mi NW center of Iquitos, ANSP 178209 (holotype of Spinipterus acsi, 3.2 cm SL, male). Known only from the type locality, at Caño Santa Rita, a tributary of the Nanay River, Amazon River basin (Ref. 87761).  No picture yet.
Hypopomidae Steatogenys elegans (Steindachner, 1880) Fr native   29.40 cm TL male/unsexed  Found in the Amazon River.  No picture yet.
Hypopomidae Steatogenys ocellatus Crampton, Thorsen & Albert, 2004 Fr native   40.50 cm TL male/unsexed  Known from Rio Itaya, a tributary of the Rio Amazonas near Iquitos (Ref. 51263).  No picture yet.
Curimatidae Steindachnerina bimaculata (Steindachner, 1876) Fr native   17.30 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). 
Curimatidae Steindachnerina binotata (Pearson, 1924) Fr native   13.30 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). Also Ref. 38013.  No picture yet.
Curimatidae Steindachnerina dobula (Günther, 1868) Fr native   16.30 cm SL male/unsexed  Known from the Amazon basin. 
Curimatidae Steindachnerina guentheri (Eigenmann & Eigenmann, 1889) Fr native   11.10 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329). 
Curimatidae Steindachnerina hypostoma (Boulenger, 1887) Fr native  Chio-chio (Spanish), Julilla (Spanish)  9.80 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329).  No picture yet.
Curimatidae Steindachnerina leucisca (Günther, 1868) Fr native  Julilla (Spanish)  15.10 cm SL male/unsexed  Known from the Amazon basin (Ref. 6329).  No picture yet.
Curimatidae Steindachnerina quasimodoi Vari & Williams Vari, 1989 Fr native   12.30 cm SL male/unsexed  Known from the Amazon River (Ref. 38013). Museum: Río Javarí, near Petropolis, Loreto, MZUSP 38593 (Ref. 27925).  No picture yet.
Apteronotidae Sternarchella calhamazon Lundberg, Coz Fernandes, Campos da Paz & Sullivan, 2013 Fr native   18.54 cm TL male/unsexed  Known from the Amazon basin (Ref. 93342).  No picture yet.
Apteronotidae Sternarchella patriciae Evans, Crampton & Albert, 2017 Fr native   20.80 cm TL male/unsexed  Type locality of Sternarchella patriciae, Madre de Dios state, Río Madre de Dios 2 km upstream bridge at Puerto Maldonado. Collected by trawling the river bottom where individuals inhabit deep river channels (10-20 m) during the day and move to shallower water at night to feed near the river margin and over flooded beaches.Stomach-content analysis indicates main food consist primarily of larger-bodied (non-planktonic) aquatic insect larvae (e.g. Odonata and Ephemeroptera) and some juvenile fishes (Ref. 126780).  No picture yet.
Apteronotidae Sternarchella raptor (Lundberg, Cox Fernandes & Albert, 1996) Fr native   19.90 cm TL male/unsexed  Collected from Loreto, Río Amazonas (Ref. 126780).  No picture yet.
Apteronotidae Sternarchella schotti (Steindachner, 1868) Fr native   40.00 cm TL male/unsexed  Type locality of Porotergus terminalis, río Amazonas, Iquitos (Ref. 126780). Found in the Amazon River basin (Ref. 36886). 
Apteronotidae Sternarchogiton nattereri (Steindachner, 1868) Fr native   25.00 cm TL male/unsexed  Found in the Amazon River basin (Ref. 36886).  No picture yet.
Apteronotidae Sternarchogiton porcinum Eigenmann & Allen, 1942 Fr native   30.00 cm TL male/unsexed  Found in the Amazon River basin (Ref. 36886).  No picture yet.
Apteronotidae Sternarchogiton preto de Santana & Crampton, 2007 Fr native   21.30 cm SL male/unsexed ;21.70 cm SL female  Known from the Amazon River basin (Ref. 75769).  No picture yet.
Apteronotidae Sternarchorhamphus muelleri (Steindachner, 1881) Fr native  Macana (Spanish)  45.50 cm TL male/unsexed  Found in the Amazon river (Ref. 6329). Also Ref. 26457, 36886.  No picture yet.
Apteronotidae Sternarchorhynchus goeldii de Santana & Vari, 2010 Fr native   30.60 cm TL male/unsexed  Collected from Rio Amazonas, beach along east bank of east channel of river, opposite Iquitos (Ref. 84053).  No picture yet.
Apteronotidae Sternarchorhynchus hagedornae de Santana & Vari, 2010 Fr native   24.90 cm TL male/unsexed ;20.60 cm TL female  Type locality, Madre de Dios: Manu Biosphere Reserve, Quebrada Pachija, tributary emptying into Río Manu 3 km upstream of Pakitza, MUSM 30534 (holotype of Sternarchorhynchus hagedornae, 24.9 cm TL, male). Collected specimens from Manu Biosphere Reserve, in the upper Río Madeira basin in south-eastern Peru (Ref. 84053).  No picture yet.
Apteronotidae Sternarchorhynchus montanus de Santana & Vari, 2010 Fr native   22.60 cm TL male/unsexed ;25.80 cm TL female  Type locality, Amazonas: Río Marañon, pongo above Borja, 35.5 km north-east Juan Velasco, Santa Maria de Nieva, MUSM 31312 (holotype of Sternarchorhynchus montanus, 22.6 cm TL, male). Known from two locations in the Río Marañon, the type locality and vicinity of Santa Maria de Nieva (Ref. 84053).  No picture yet.
Apteronotidae Sternarchorhynchus mormyrus (Steindachner, 1868) Fr native   54.00 cm TL male/unsexed    No picture yet.
Apteronotidae Sternarchorhynchus stewarti de Santana & Vari, 2010 Fr native   22.90 cm TL male/unsexed  Type locality, Amazonas: Río Marañon, log riffle, 1.57 km east-north-east of Juan Velasco Santa Maria de Nieva, MUSM 30409 (holotype of Sternarchorhynchus stewarti, 18.2 cm TL) (Ref. 84053).  No picture yet.
Apteronotidae Sternarchorhynchus taphorni de Santana & Vari, 2010 Fr native   31.00 cm TL male/unsexed  Type locality, Departamento de San Martin: Río Huallaga, Uchiza, MUSM 6635 (holotype of Sternarchorhynchus taphorni, 31 cm TL, sexually dimorphic male). Known from the upper portions of the Río Huallaga and adjoining left bank tributaries of the Río Ucayali basin of eastern Peru (Ref. 84053).  No picture yet.
Sternopygidae Sternopygus macrurus (Bloch & Schneider, 1801) Fr native   141 cm TL male/unsexed   
Characidae Stethaprion erythrops Cope, 1870 Fr native  Palometa (Spanish)  8.80 cm SL male/unsexed  Known from the Amazon River (Ref. 6329). Also Ref. 36891. 
Belonidae Strongylura exilis (Girard, 1854) Fr, Br, M native  Garfish (English), Aguja (Spanish), California needlefish (English), Pike needlefish (English), Marao de California (Spanish), Pez aguja (Spanish), Picuda (Spanish)  91.00 cm TL male/unsexed  Also Ref. 2850. 
Loricariidae Sturisoma graffini Londoño-Burbano, 2018 Fr native   26.62 cm SL male/unsexed  Type locality from Sturisoma graffini, Madre de Dios River, Amazon (Ref. 128471).  No picture yet.
Loricariidae Sturisoma guentheri (Regan, 1904) Fr native  Shitari (Spanish)  23.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36389).  No picture yet.
Loricariidae Sturisoma lyra (Regan, 1904) Fr native  Shitari (Spanish)  25.00 cm TL male/unsexed  Known from the Juruá River basin (Ref. 36389).  No picture yet.
Loricariidae Sturisoma nigrirostrum Fowler, 1940 Fr native  Shitari (Spanish)  22.00 cm male/unsexed  Known from the Ucayali River basin (Ref. 36389). 
Cichlidae Symphysodon aequifasciatus Pellegrin, 1904 Fr, Or native  Disco azul (Spanish), Pez disco (Spanish)  13.70 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36377). Occurs in Nanay (introduced, Ref. 33249). Exported as an aquarium fish (Ref. 9235). 
Synbranchidae Synbranchus madeirae Rosen & Rumney, 1972 Fr native  Atinga (Spanish)  100.00 cm TL male/unsexed  Known from the Amazon River.  No picture yet.
Synbranchidae Synbranchus marmoratus Bloch, 1795 Fr, Or native  Atinga (Spanish), Marbled eel (English)  150 cm TL male/unsexed  Occurs in the Amazon, Nanay, Itaya (near Iquitos), Pacaya and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Cichlidae Tahuantinsuyoa chipi Kullander, 1991 Fr endemic   8.20 cm SL male/unsexed  Known from the Amazon River basin in the Pachitea River basin (Ref. 36377).  No picture yet.
Cichlidae Tahuantinsuyoa macantzatza Kullander, 1986 Fr native   12.00 cm TL male/unsexed  Known from small rivers and streams tributaries to the Rio Aguaytia, principally the Huipoca, Huacamayo and Negro, along the Tingo Maria-Pucallpa road (Ref. 9088). Also Ref. 36377. 
Auchenipteridae Tatia gyrina (Eigenmann & Allen, 1942) Fr native  Kere kere (Spanish)  4.20 cm SL male/unsexed  Known from the Amazon River (Ref. 79512). Found in a brook near Rio Itaya, Iquitos (Ref. 6868). 
Auchenipteridae Tatia intermedia (Steindachner, 1877) Fr native  Kere kere (Spanish)  12.00 cm SL male/unsexed   
Doradidae Tenellus ternetzi (Eigenmann, 1925) Fr native   12.86 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Doradidae Tenellus trimaculatus (Boulenger, 1898) Fr native   11.40 cm SL male/unsexed   
Characidae Tetragonopterus argenteus Cuvier, 1816 Fr native   11.20 cm SL male/unsexed  Known from Río Itaya, Río Marañon, Río Ucayali (Ref. 124043). 
Characidae Tetragonopterus chalceus Spix & Agassiz, 1829 Fr native   12.70 cm TL male/unsexed  Known from the Amazon (Ref. 6329), Río Nanay and Rio Maranõn (Ref. 124043). 
Batrachoididae Thalassophryne amazonica Steindachner, 1876 Fr native   9.30 cm SL male/unsexed  Museum: Río Itaya, north of Iquitos, USNM uncat. (2, 22.5-68.2) (Ref. 30721). 
Characidae Thayeria boehlkei Weitzman, 1957 Fr native  Mojara (Spanish)  3.15 cm SL male/unsexed  Also Ref. 38376. 
Gasteropelecidae Thoracocharax securis (De Filippi, 1853) Fr native   6.80 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39056). 
Gasteropelecidae Thoracocharax stellatus (Kner, 1858) Fr, Or native  Pechito thoracothorax (Spanish), Pechito (Spanish), Perchito plateado (Spanish)  6.70 cm SL male/unsexed  Occurs in the Amazon River and its tributaries; also in Nanay River (near Iquitos). Exported as an aquarium fish (Ref. 9235). 
Auchenipteridae Trachelyichthys exilis Greenfield & Glodek, 1977 Fr native  Cunshi novia (Spanish)  8.00 cm SL male/unsexed  Known from Nanay River basin in the upper Amazon River drainage (Ref. 37098). Found in the Rio Mamón (Ref. 6868). 
Auchenipteridae Trachelyopterus brevibarbis (Cope, 1878) Fr native    Found in Pebas (Ref. 6868). Type locality, Amazon (Ref. 46206).  No picture yet.
Auchenipteridae Trachelyopterus galeatus (Linnaeus, 1766) Fr, Or native  Novia cunchi (Spanish), Novia (Spanish), Zamora cunchi (Spanish)  30.00 cm TL male/unsexed ;23.00 cm TL female  Occurs in Ucayali, Marañón and Samiria Rivers. Exported as an aquarium fish (Ref. 9235). 
Auchenipteridae Trachelyopterus isacanthus (Cope, 1878) Fr native    Found in Pebas (Ref. 6868). Type locality, Amazon (Ref. 46206).  No picture yet.
Doradidae Trachydoras gepharti Sabaj & Arce H., 2017 Fr native   7.12 cm SL male/unsexed    No picture yet.
Doradidae Trachydoras microstomus (Eigenmann, 1912) Fr native   5.90 cm SL male/unsexed    No picture yet.
Doradidae Trachydoras nattereri (Steindachner, 1881) Fr native  Pirillo (Spanish)  12.40 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Doradidae Trachydoras steindachneri (Perugia, 1897) Fr native  Pirillo (Spanish)  16.00 cm SL male/unsexed  Known from the Amazon River (Ref. 37054). 
Trichomycteridae Trichomycterus dispar (Tschudi, 1846) Fr native   26.00 cm male/unsexed  Type locality: Streams of the Andean Cordillera, Peru, elev. to 14000 ft. (Ref. 26282).  No picture yet.
Trichomycteridae Trichomycterus megantoni Fernández & Quispe Chuquihuamaní, 2007 Fr native   10.09 cm SL male/unsexed   
Trichomycteridae Trichomycterus piurae (Eigenmann, 1922) Fr native   10.10 cm SL male/unsexed  Known from the Piura River basin (Ref. 39970). Also Ref. 6868.  No picture yet.
Trichomycteridae Trichomycterus punctulatus Valenciennes, 1846 Fr native   14.75 cm SL male/unsexed  Type locality: Lima, Peru (Ref. 26282). 
Trichomycteridae Trichomycterus rivulatus Valenciennes, 1846 Fr native   37.40 cm TL male/unsexed  Type locality: Lake Titicaca, affluent of Apurimac, Guasacona, Peru (Ref. 26282). 
Trichomycteridae Trichomycterus taczanowskii Steindachner, 1882 Fr native   11.30 cm male/unsexed  Type locality: North and central Peru, in the Andes. Rio Huambo; Rio Totara em Chiricimoto (Ref. 6868). Also Ref. 39970.  No picture yet.
Trichomycteridae Trichomycterus taeniops Fowler, 1954 Fr native   9.20 cm male/unsexed  Known from the Ucayali River basin (Ref. 39970).  No picture yet.
Trichomycteridae Trichomycterus vittatus Regan, 1903 Fr native   7.80 cm male/unsexed  Type locality: Marcapata Valley, e. Peru (Ref. 26282, 6868). Also Ref. 39970.  No picture yet.
Trichomycteridae Trichomycterus weyrauchi (Fowler, 1945) Fr native   4.90 cm male/unsexed  Known from the Ucayali River basin at 2900 m elevation (Ref. 39970).  No picture yet.
Achiridae Trinectes fluviatilis (Meek & Hildebrand, 1928) Fr, Br, M native  Lenguado (Spanish)  5.00 cm male/unsexed   
Triportheidae Triportheus albus Cope, 1872 Fr native  Sardina (Spanish)  25.70 cm TL male/unsexed  Found in the Amazon River (Ref. 38376). 
Triportheidae Triportheus angulatus (Spix & Agassiz, 1829) Fr native   23.80 cm SL male/unsexed   
Triportheidae Triportheus culter (Cope, 1872) Fr native  Sardina (Spanish)  24.50 cm SL male/unsexed   
Triportheidae Triportheus curtus (Garman, 1890) Fr native   10.68 cm SL male/unsexed  Found in the Amazon River (Ref. 38376).  No picture yet.
Triportheidae Triportheus elongatus (Günther, 1864) Fr native   24.20 cm SL male/unsexed  Found in the Amazon River basin (Ref. 38376). 
Triportheidae Triportheus pictus (Garman, 1890) Fr native   10.74 cm SL male/unsexed  Found in the Amazon River (Ref. 38376).  No picture yet.
Triportheidae Triportheus rotundatus (Jardine, 1841) Fr, Or native  Catalina (Spanish), Sardina (Spanish), Triportheus de aletas negras (Spanish)  26.80 cm TL male/unsexed  Occurs in the Amazon River and its tributaries and in Nanay River (near Iquitos). Exported as an aquarium fish (Ref. 9235). 
Characidae Trochilocharax ornatus Zarske, 2010 Fr native   1.70 cm SL male/unsexed   
Auchenipteridae Tympanopleura atronasus (Eigenmann & Eigenmann, 1888) Fr native  Cunshi novia (Spanish)  14.90 cm SL male/unsexed   
Auchenipteridae Tympanopleura brevis (Steindachner, 1881) Fr native  Cunshi novia (Spanish)  16.00 cm SL male/unsexed  Known from the Amazon River (Ref. 37098).  No picture yet.
Auchenipteridae Tympanopleura cryptica Walsh, Ribeiro & Rapp Py-Daniel, 2015 Fr native   8.49 cm SL male/unsexed  Known from Loreto Region (Ref. 103256).  No picture yet.
Auchenipteridae Tympanopleura longipinna Walsh, Ribeiro & Rapp Py-Daniel, 2015 Fr native   8.13 cm SL male/unsexed  Known throughout the upper and middle Amazon River basin (Ref. 103256).  No picture yet.
Characidae Tyttobrycon hamatus Géry, 1973 Fr native   1.75 cm SL male/unsexed  Recorded from the Amazon.  No picture yet.
Characidae Tyttocharax cochui (Ladiges, 1950) Fr native  Mojarita (Spanish)  2.14 cm SL male/unsexed  Known from the Amazon River basin (Ref. 6329, 38597). 
Characidae Tyttocharax tambopatensis Weitzman & Ortega, 1995 Fr native  common (usually seen) 1.55 cm SL male/unsexed  Known from Manu and Tambopata River basins (Ref. 38597). Type locality: Parque Nacional Manu, Pakitza Tachigalli trail 2, Quebrada Trompetero, ca. 11°55'48"S, 71°15'18"W, Manu (Ref. 26646). Museum: near Zona Reservada Tambopata-Candamo, Puerto Maldonado, Provincia Tambopata, Dept. Madre de Dios, MZUSP 47571 (paratypes) (Ref. 27925). 
Trichomycteridae Vandellia cirrhosa Valenciennes, 1846 Fr native   17.00 cm SL male/unsexed  Known from the Amazon River basin (Ref. 39970). Recorded from Río Ucayali (Ref. 6868). 
Characidae Varicharax nigrolineatus Vanegas-Ríos, Faustino-Fuster, Meza-Vargas & Ortega, 2020 Fr native   3.62 cm SL male/unsexed ;3.06 cm SL female  Type locality of Varicharax nigrolineatus Loreto, Trompeteros, Yananmaca creek, tributary of Río Corrientes, Río Marañón drainage (Ref. 121996).  No picture yet.
Characidae Xenurobrycon heterodon Weitzman & Fink, 1985 Fr native  Mojarita (Spanish)  2.05 cm SL male/unsexed  Known from the Amazon River (Ref. 6329, 38597).  No picture yet.
Characidae Xenurobrycon polyancistrus Weitzman, 1987 Fr native   1.44 cm SL male/unsexed  Known from Madre de Dios basin.  No picture yet.
Aspredinidae Xyliphius melanopterus Orcés V., 1962 Fr native   14.70 cm SL male/unsexed  Known from the Amazon River basin (Ref. 36695). 
Aspredinidae Xyliphius sofiae Sabaj, Carvalho & Reis, 2017 Fr native   4.41 cm SL male/unsexed  Occurs in the Amazon River near the town of Iquitos (Ref. 116022).  No picture yet.
Pimelodidae Zungaro zungaro (Humboldt, 1821) Fr native   140 cm SL male/unsexed  Found in the Amazon basin. Also Ref. 26389, 36506. 
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