Grey Featherback

About

The grey featherback (Notopterus notopterus), also sold as the bronze featherback or Asiatic knifefish, is a large notopterid from the slow-moving rivers, floodplains, lakes, and canals of Southeast Asia, with populations found across Thailand, Myanmar, Peninsular Malaysia, Indonesia, and beyond. Like all members of its family, it carries a distinctly humped body profile, a long anal fin that merges continuously into the tail, and very fine scales. Giving it that characteristic knifefish silhouette. Adults are a plain warm brown, though juveniles show a series of dark vertical bars that fade as the fish matures. A small but functional dorsal fin is one of the easiest ways to tell this species apart from the superficially similar African brown knifefish. In the wild, grey featherbacks migrate seasonally between the Mekong mainstream and surrounding floodplains, and they are obligate air-breathers, so access to the surface is non-negotiable in captivity. Temperament is complicated: they are generally tolerant of larger tankmates that pose no threat, but they will readily eat anything small enough to swallow, and they turn territorial toward their own kind or fish with a similar body shape. Despite being listed as beginner-level in some sources, the sheer adult size demands serious commitment. This is not a fish for an average community setup.