Anostomus ternetzi

Anostomus ternetzi, the red mouth headstander, is a fish in the family Anostomidae.

Etymology
The fish is named in honor of ichthyologist and naturalist Carl Ternetz (1870–1928), who collected the type specimen.

Description
It can grow to 12 cm total length.

Distribution and habitat
Anostomus ternetzi is widespread in South America: it is found in the Orinoco, Araguaia and Amazon River basins (Brazil, Colombia, and Venezuela) as well as in coastal rivers of Guianas. It occurs in both black and clear water rivers.