Dwarf tetra
| Dwarf tetra | ||||||||||||
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Dwarf tetra ( Nannostomus marginatus ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Nannostomus marginatus | ||||||||||||
| Eigenmann , 1909 |
The dwarf tetras ( Nannostomus marginatus ) belongs to the family of slim tetra (Lebiasinidae) and occurs in the lower and middle Amazon , in Venezuela , Colombia and Peru in the lowlands east of the Andes as well as in Guyana and Suriname .
features
The dwarf ornamental tetra has a more compact body than other Nannostomus species and is one of the smallest species in the genus with a length of 3.5 to 4 centimeters. It swims horizontally and is golden yellow in color, the back is olive green, the underside is white. Three black longitudinal stripes run from the head to the tail stalk. The middle longitudinal stripe is the widest, with a short red line on its upper edge. There is a red spot each on the dorsal , anal and pelvic fins . The leading edges of the dorsal and anal fin are black.
The sexes can be differentiated by the anal fin, which in the male is rounded at the back, in the female it ends straight and is pointed. Dwarf tetra spawn between delicate plants, in the aquarium every 3 to 4 days if they are well fed.
- Fin formula : dorsal 2/8, anal 3/9, ventral 2/7.
- Scale formula : QR 5, SL 3–5.
literature
- Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
Web links
- Zwergziersalmler on Fishbase.org (English)