Yellow from Rio
| Yellow from Rio | ||||||||||||
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Yellow from Rio ( Hyphessobrycon bifasciatus ), juvenile fish with reddish fins. |
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| Scientific name | ||||||||||||
| Hyphessobrycon bifasciatus | ||||||||||||
| Ellis , 1911 |
The yellow of Rio ( Hyphessobrycon bifasciatus ), also known as the yellow tetras and brass tetra , is a freshwater fish found in coastal rivers of southern Brazil from Espírito Santo to Rio Grande do Sul and in the upper Río Paraná .
features
It reaches a length of about 5 cm (females stay smaller) and is very similar to the red of Rio ( H. flammeus ). The body is stocky, high back and flattened on the sides. The basic color is silvery, yellowish or shiny greenish. Behind the gill cover one can see two slightly protruding elongated spots. The side line is drawn with dark, interlocking angle paints. The fins are gray, the leading edges of the dorsal and anal fin are white. The fins of the fry are red.
- Fin formula : dorsal 11, anal 29–32.
- Scale formula : mLR 33–36, QR 6–7 / 5–6, SL 6–9.
The yellow of Rio is often attacked by the larvae ( metacercaria ) of certain flukes (Trematoda). The fish encapsulate the parasites with guanine excretions, which gives the fish an intense golden color and makes them interesting for aquaristics . Aquarium offspring lack this golden sheen.
literature
- Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
- Axel Zarske: Hyphessobrycon bifasciatus. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 498.
Web links
- Gelber von Rio on Fishbase.org (English)