Fin's Fish Guide
The Twospot astyanax (Astyanax bimaculatus) is a freshwater fish of the family Characidae that grows up to 18 cm.
Fresh water of much of South America, in rivers, streams, lakes and floodplains.
Description
The twospot astyanax is a silvery characin of the family Characidae (true tetras) reaching about 18 cm. The laterally compressed body has an adipose fin (as in many characins), a dark shoulder spot and a spot on the tail base that continues into the middle tail rays - the two spots from which the species takes its name. The species is one of the most widespread and abundant freshwater fish of South America and lives in schools in rivers, streams, lakes and floodplains. As an opportunistic omnivore it eats insects, seeds, plant matter, algae and small invertebrates. In the rainy season it spawns on flooded margins. Through its great numbers it is a key prey fish and a locally much-caught small food fish.
Frequently asked questions
How do you recognise the Twospot astyanax?
The Twospot astyanax has a flattened, disc-shaped body, is mainly silver-grey and shows a spots pattern. Silvery little tetra with an adipose fin, a shoulder blotch and a dark blotch on the caudal peduncle that continues into the middle caudal rays.
Where does the Twospot astyanax live?
The Twospot astyanax lives in fresh water and is mostly found around open water. Fresh water of much of South America, in rivers, streams, lakes and floodplains.
How big does the Twospot astyanax get?
The Twospot astyanax grows to a maximum of about 18 cm.
Is the Twospot astyanax dangerous to humans?
No, the Twospot astyanax is harmless to humans. None required: this species is harmless to humans.
Is the Twospot astyanax edible?
Yes, the Twospot astyanax is commonly eaten.
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All data
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Appearance
Habitat & distribution
Behaviour & biology
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Status & sources
Same genus Astyanax
More from the family Characidae
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