Heterotis

…African Clupisudis (also known as Heterotis), the South American arawana (Osteoglossum bicirrhosum), and two species of the East Indian genus Scleropages.

Some species of Osteoglossidae (Heterotis, Arapaima, and Pantodon), Notopteridae (Chitala, Notopterus, Papyrocranus, Xenomystus), and the Gymnarchidae are able to breathe air at the surface; thus, they can live in areas where the water is deoxygenated.