HomeFish encyclopediaRay-finned fishesBony tonguesElephantfishesGraham's stonebasher Graham's stonebasher (Hippopotamyrus grahami) Scientific name: Hippopotamyrus grahami Norman, 1928 The Graham's stonebasher (Hippopotamyrus grahami) is a freshwater fish of the family Mormyridae. Native range: Africa, Lake Victoria and affluent rivers, Kyoga basin. BiologyOccurs in shallow coastal waters over sand. Feeds on a wide range of prey, including the larvae of Chaoborus. Oviparous. Migrates up the river to spawn.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHippopotamyrus grahamiFamilyMormyridae (Elephantfishes)OrderOsteoglossiformes (Bony tongues)ClassActinopterygii (Ray-finned fishes)Maximum length25.0EnvironmentFreshwater; benthopelagic; potamodromousClimateTropicalDistributionAfrica: Lake Victoria and affluent rivers, Kyoga basin.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Fec = 248) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026