Tetras are one of the world’s most species rich family of fish (over 1,000 species). Now we can add another species – and genus – to the family. Phycocharax rasbora is a tetra discovered from a dammed portion of rio Braço Norte, a blackwater tributary with muddy organic substrate that is rich with algae. The new species is highly abundant here.
The males and females are sexually dimorphic; the males are considerably more colorful with lots of dull to bright red “flecking” throughout its body, notably the eyes and belly.
Phycocharax rasbora is described in PLOS.