It also, on occasion, is found as an aquarium fish, though its large size and piscivorous nature make it unsuitable for most aquarists. It was formerly believed to the only species in the genus and widespread in sub-Saharan Africa, but studies in 2011-2013 have found that there are several species, and the true "H. odoe" is restricted to West and Central Africa from the Sassandra River, Ivory Coast, to the Kienké River, Cameroon (species elsewhere are now recognized as separate; "H. cuvieri", "H. kingsleyae", "H. lineata" and "H. occidentalis").