Hypancistrus sp. “L236”

Order: Siluriformes
Suborder: Loricarioidei
Family: Loricariidae
Subfamily: Hypostominae
Genus: Hypancistrus
Species: not described yet

Hypancistrus sp. "L236" is with around 12 cm body length a rather small pleco and is therefore easy to fit in most tanks.

This unsubscribed species shows a white to yellow ground coloration with a black, grey or brown wormline pattern. Its pattern has a high variability and can show a transition from dots to worm-lines to stripes.

Hypancistrus sp. "L236" lives in the Rio Xingu. It was long thought, this fish is endemic to Rio Iriri, a side arm of the Rio Xingu. This information turned out to be a hoax, since this fish couldn't be found later in that area but in a channel below the Volta Grande of the Rio Xingu.

Its habitat consists mostly of dark, rocky substrate with a strong water current. Highly oxygenated and warm water can be found in its biotope. There, temperatures of over 30 °C can be reached.

This plecos diet consists mainly of insect (larvae), worms and crustaceans.

In captivity this fish will take almost every commercial food. Nonetheless it should be taken care, that its food is rich in proteins. We feed them mostly with Krill soft granulate or Artemia soft granulate, Dr. Bassleer Biofish Food Garlic and Snail soft granulate.

Tanks upwards from 80 cm length can be used for sheltering a group of H. sp. "L236". The substrate can range from fine sand to rougher gravel. A construction of stone slates with built in little rocks and pleco caves, is a good way, to give these fish the possibility to hide and breed. There should always be more caves available, then the number of plecos in the tank. This avoids fights for breeding- and hiding spots. They don't like bright light and are in general shy fish that are rarely seen outside, during the day.

It is important to give the fish their needed water conditions. 28 - 30 °C warm water, a strong current, a lot of oxygen via a air stone and weekly waterchanges are mandatory. This species prefers slightly acidic water with an electrical conductivity under 200 micro siemens.

Since Hypancistrus sp. "L236" is a really peaceful species, community tank set-ups can work well, if the needed parameters are given. To dominant fish, that are faster at the food, than the "L236"s, shouldn't be kept together with them.

Sexing Hypancistrus spp. follows mostly the same rules as it is also with "L236" and is in general not to difficult with a good look on the specimens or good pictures available.

A look from the side reveals a more robust and bulky body of the male. The female shows a pointier silhouette.

Where as the male has a quite short rather round head, the female shows a more pointy snout.

Odontodes on the snout itself are with both sexes not visible.

Other than that, the odontodes on the gills are longer and more numerous with the male.

The same goes for the odontodes on the pectoral fins. Females show less of them. Also the hard ray of the pectoral fin itself is thicker with males.

If there is odontodes visible on the tails, males tend to show them more, where as females tend to be rather smooth.

The top view of these foto's can be a bit confusing on the first view. This is because the male is rather good in shape, where as the female doesn't seem to be gravid at the moment and shows therefore almost no curves. With closer inspection we can at least still see that the male is broadest around the shoulders. Gravid females show the thickest part in the belly region. Also visible in this view are the small odontodes on the tail of the male.

The head of the male is broader and round. The gill flaps stand out more prominent. The female shows a pointy head.

From underneath it is also again easy to tell the sex. The males papilla is rather large but still shows the more narrow male shape. Females show the papilla more roundish and with closer inspection also a few yellow spots are visible. Probably because of selection to white coloration the females seem to show less pigments in those spots than other plecos.

The breeding of this species quite usual now in the hobby and also not so difficult to achieve. Also this Hypancistrus is a cave breeder, where the male takes care of the brood.

To get Hypancistrus sp. "L236" to spawn, first a good ratio of adult  males to females is necessary. It is always good to have slightly more males than females in the tank. That way females can chose with which male they want to spawn. The tank shouldn't be to crowded. An ideal group consists of 6 - 8 specimens in a 100 - 200 liter aquarium. The tank should be set up with a lot of hiding spaces, in form of stone slate - constructions. In between the gaps and on the floor, pleco caves should be added. We made best results with round caves of the length of 13 - 15 cm and a diameter of around 4 - 4,5 cm.

The water parameters should now measure 30 °C, and a e.c. of 100 - 150 micro siemens. Best is, to change the water regularly with osmosis water. To get the highly oxygenated water to where it's needed, it's best to place a streaming pump facing to the entrances of the caves.

The plecos should now be fed really good and rich in proteins. This can be achieved by frosted food or processed food. We made best experiences with Futterdose krill and Genzel Artemia granules. Soon the females will build up eggs and the males get spiky and will sit in their caves fanning with their fins.

Once a female is interested in a potential mating partner, it sits mostly for several days next to the cave, that male is occupying. Is everything right, the pair starts to tunnel in the cave. This mostly takes not longer than two days.

After one or two days, only the male sits in the cave. Mostly a bit elevated since it sits with its mouth on a egg batch. This species lays up to 10 - 30 eggs. These eggs will now be protected and cleaned by the father, till the larvae hatch. That's mostly after around 6 - 7 days, depending on temperature.