Fin's Fish Guide
The Threadfin tetra (Nematocharax venustus) is a freshwater fish of the family Characidae that grows up to 5 cm.
Description
The threadfin tetra is a small characin (Characidae) from fresh water of eastern Brazil. The species grows to about 5 cm and has a deep, silvery body; adult males develop conspicuously long, thread-like extensions on the dorsal, anal and pelvic fins. It lives in schools in clear streams and eats small insects, larvae and plant material. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Threadfin tetra?
The Threadfin tetra has a flattened, disc-shaped body and is mainly silver-grey.
Where does the Threadfin tetra live?
The Threadfin tetra lives in fresh water and is mostly found around mixed bottom. South America: Brazil
How big does the Threadfin tetra get?
The Threadfin tetra grows to a maximum of about 5 cm.
Is the Threadfin tetra dangerous to humans?
No, the Threadfin tetra is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
More from the family Characidae
Want the complete picture on the Threadfin tetra?
Point your camera at the fish and Fin names the species in seconds. Free, and the Threadfin tetra is one of 12,519 species in the app.