Head and Taillight Tetra - Hemigrammus ocellifer : Complete Fish Profile & Care Guide
Table of contents
Introduction
The Head-and-tail-light Tetra (Hemigrammus ocellifer) is a captivating and popular choice among aquarium enthusiasts. Renowned for its distinctive appearance and peaceful disposition, this species hails from the freshwater habitats of South America. Its striking name is derived from the iridescent markings that resemble both headlights and taillights, providing a unique and enchanting display when the fish catch the light. In addition to its appealing aesthetics, the Head-and-tail-light Tetra is known for its amicable nature, making it a suitable addition to community aquariums. This species offers aquarists the opportunity to appreciate both its visual charm and harmonious coexistence with other freshwater species, making it a favoured selection for hobbyists of varying experience levels.
Head-and-tail-light Tetras thrive when maintained in groups of six or more individuals, as they naturally exhibit shoaling behaviour. While generally peaceful, there is a possibility of them fin-nipping slower or long-finned fish; hence it is advisable to avoid such tankmates. Suitable companions for these Tetras include Livebearers, Danios, Rasboras, and other Tetra species, as well as peaceful bottom-dwelling fish like Corydoras and smaller Loricariids. They can also coexist with a majority of Gouramis and Dwarf Cichlids commonly found in the aquarium trade. However, it's crucial to refrain from housing them with larger species, such as Angel Fish, as they may perceive them as prey.
The aquarium in which these Tetras are housed should be thoughtfully arranged with abundant aquatic vegetation, including floating plants, to mitigate the intensity of bright lighting. While creating the aquascape, it is imperative to incorporate both hiding places and open swimming areas. Furthermore, it is worth noting that the vibrant colours of these Tetras are most vividly showcased in aquariums featuring a dark substrate and background.
The Head-and-tail-light Tetras have two unique markings that make them stand out in your aquarium. One is near the head, right behind the eye, and the other is next to the base of the caudal fin. These markings seem to flash as they swim and turn in the aquarium, catching the light at the right angle. They also have a dark lateral line that runs across half of their body, and their reflective silver background colouration adds to their attractiveness. These Tetras are relatively hardy and adaptable, making them an ideal choice for both beginner and experienced aquarists alike.
Head and Taillight Tetra Photos
Sexual Dimorphism
The Head-and-tail-light Tetra can be accurately sexed by examining their swim bladders, which are visible through their transparent skin. Male swim bladders are relatively narrow, whereas female swim bladders are rounded. As a result, adult females are slightly more extensive and heavier-bodied compared to their male counterparts, which are smaller and slimmer.
Quick Facts
| Scientific Name | Hemigrammus ocellifer |
|---|---|
| Year Described | 1882 |
| Other Names | Beacon Fish, Beacon Tetra |
| Kingdom | Animalia |
| Classification | Actinopterygii |
| Order | Characiformes |
| Family | Characidae |
| Genus | Hemigrammus |
| Origins | Suriname , Guyana , Peru , Brazil |
| Max Size | 5 cm |
| Temperament | Peaceful |
| Aquarium Level | Middle - Top |
| Difficulty | Beginner |
| Shoaling | Yes |
| Best kept as | Groups 6+ |
| Diet & Feeding | Omnivore |
| Reproduction | Egg-Scatterer |
| Average Lifespan | Up to 5 Years |
Water Parameters
| Water Type | Freshwater |
|---|---|
| pH | 5.5 - 7.5 |
| GH | 5 - 20 |
| ℉ | 75 - 82 |
|---|---|
| ℃ | 23 - 27 |
Natural Habitat
The Head-and-tail-light Tetra is a remarkable fish from South America's lush river basins, specifically Suriname, Guyana, French Guiana, Peru, and Brazil in the Amazon Basin. These fish are typically found in slow-moving rivers, streams, tributaries, and floodplain lakes, mainly located in the lower river and coastal regions, where they can thrive amidst the dense vegetation that characterizes these areas. As a result, their natural habitat is both serene and vibrant, and it is an excellent representation of the incredible biodiversity of the Amazon Basin.
Breeding
Breeding the Head-and-tail-light Tetra is relatively easy, but a separate breeding tank is necessary to increase the yield of fry. The breeding tank should be dimly lit and contain bundles of fine-leaved plants such as Java moss or spawning mops to give the fish a place to deposit their sticky eggs. Covering the bottom of the tank with mesh, with appropriately sized holes, is also recommended to allow the eggs to fall through while preventing the parents from reaching them.
Spawning can be initiated by conditioning a group of six or more males and females with a diet rich in live and frozen foods. Alternatively, the fish can be prepared in separate tanks, with the temperature slightly raised and the water made somewhat acidic, before introducing the selected breeding pair into the breeding tank. To prevent the adults from consuming the eggs, they must be removed as soon as they are noticed.
The eggs will typically hatch in 24 to 36 hours, and the fry will become free-swimming three to four days after that. Initially, the fry should be fed with infusoria-type foods until they are large enough to accept baby brine shrimp and microworms. Keeping the lights dim or off during the early stages is essential, as the eggs and fry are sensitive to light. In summary, with careful preparation and attention to detail, the Head-and-tail-light Tetra can be bred successfully in captivity, providing an exciting opportunity for aquarists to observe and appreciate this delightful species.
Diet & Feeding
The Head-and-tail-light Tetra is an undemanding feeder, and its dietary needs can be easily met with various food options. While it will readily accept good quality dried foods such as granules and flakes, you can further enhance its health and vibrancy by supplementing its diet with small live and frozen foods like brine shrimp, bloodworm, and daphnia. Incorporating a varied diet consisting of both dry and frozen meals is highly recommended to ensure that these fish receive all the essential nutrients required for optimal health and colouration.
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