Hemiancistrus medians (Kner 1854)

Lives in the main jets of rapids where the current is very strong. The substrate consists of bulky rocks which gives them shelter. Occurs together with the following species: Leporinus granti, Astyanax meunieri, Bryconops caudomaculatus; Parodon guyanensis, Harttia surinamensis, Hypostomus gymnorhynchus, Lasiancistrus brevipinnis and Heptapterus longior (Ref. 35381).

Hemiancistrus medians is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Maroni basin. This species is usually found in rapids with a strong current and a substrate of large, shelter-providing rocks. It is known to coexist with the species Bryconops caudomaculatus, Chasmocranus longior, Harttia surinamensis, Hypostomus gymnorhynchus, Jupiaba meunieri, Leporinus granti, and Parodon guyanensis.

This species is large for a loricariid, reaching 39 cm (15.4 inches) in total length.