Tail tetra
| Tail tetra | ||||||||||||
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Tail tetra ( Hemigrammus unilineatus ) |
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| Scientific name | ||||||||||||
| Hemigrammus unilineatus | ||||||||||||
| Gill , 1858 |
The tailed tetra ( Hemigrammus unilineatus (with a line)) is a freshwater fish widespread in northern South America . The distribution area includes the Amazon basin , south to the Rio Guaporé (Bolivia), the coastal rivers of Venezuela , the three Guayanas and Trinidad . Hemigrammus unilineatus is the type species of the genus Hemigrammus .
features
It grows to a size of 5 to 5.3 cm. Its body is typical of the genus, elongated, slightly higher than other species of the genus and laterally flattened. Its color is translucent greenish gray. A shiny gold longitudinal band runs along the flanks over the translucent spine. Occasionally you can also see a dark shoulder mark. The fins are colorless, the caudal fin occasionally reddish. The front edge of the dorsal and anal fin are first white, then black.
- Fin formula : dorsal 11, anal 23-27.
- Scale formula : mLR 30–31 + 2–3, QR 5 / 3–4½, SL 5–8.
Way of life
The fish live in ponds, trenches, slow-flowing streams, both in clear and murky water, in open and shady areas. They feed on small crustaceans, insects and mollusks .
literature
- Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
- Axel Zarske: Hemigrammus unilineatus. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 466.
Web links
- Tail tetra on Fishbase.org (English)