HomeFish encyclopediaRay-finned fishesBony tonguesElephantfishesTrunkfish Trunkfish (Marcusenius senegalensis gracilis) Scientific name: Marcusenius senegalensis gracilis Pellegrin, 1922 The Trunkfish (Marcusenius senegalensis gracilis) is a freshwater fish of the family Mormyridae. Native range: Africa, Chad basin. Species factsScientific nameMarcusenius senegalensis gracilisFamilyMormyridae (Elephantfishes)OrderOsteoglossiformes (Bony tongues)ClassActinopterygii (Ray-finned fishes)Maximum length9.5EnvironmentFreshwater; demersalClimateTropicalDistributionAfrica: Chad basin.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026