Three-banded tetra

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Three-banded tetra
Systematics
Sub-cohort : Ostariophysi
Otophysa
Order : Tetras (Characiformes)
Family : True tetras (Characidae)
Genre : Hyphessobrycon
Type : Three-banded tetra
Scientific name
Hyphessobrycon heterorhabdus
( Ulrey , 1895)

The three- banded tetra ( Hyphessobrycon heterorhabdus ; Greek heteros "different", rhabdus "line") is a freshwater fish from the middle and lower Amazon region . It is kept as an aquarium fish and was first introduced to Germany for this purpose in 1910. In the beginning it was often confused with the flag tetra ( Hemigrammus ulreyi ), which is why it is also referred to as "False Ulrey".

features

The elongated and laterally strongly flattened body of the three-banded tetra can reach a total length of four centimeters. The males, however, remain smaller than the somewhat plump females. The back is colored red-brown, the sides are yellow-brown in color. The belly is olive-colored to shiny silver. A three-colored longitudinal band extends from the gill cover to the root of the caudal fin . The top of the three partial bands is red, the middle white to shiny gold and the bottom stripe is deep black. The upper half of the iris shows a strong red. The fins are colorless or somewhat yellowish and sometimes end in white tips.

Fin formula : dorsal 10, anal 20–23

The three-volume tetra has 32 to 34 scales along a central longitudinal row (mLR) and eight to nine scales in the side line.

Reproduction

Like many other tetra species, the three- banded tetra is also a free spawner . Its eggs and brood are sensitive to light. The relatively small offspring swim freely from the fifth day after hatching.

supporting documents

  1. ↑ a b c Axel Zarske: Hyphessobrycon heterorhabdus. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 501 f.
  2. ^ Rüdiger Riehl, Hans A. Baensch : Aquariums Atlas. 14th edition. Volume 1, Mergus Verlag, Melle 2002, ISBN 3-88244-065-1 , p. 288.
  3. ↑ a b Günther Sterba : Freshwater fish of the world. Weltbild Verlag, Augsburg 1998, ISBN 3-89350-991-7 , p. 104.

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