HomeFish encyclopediaRay-finned fishesFlatfishesSolesTrue sole True sole (Heteromycteris proboscideus) Scientific name: Heteromycteris proboscideus Chabanaud, 1925 The True sole (Heteromycteris proboscideus) is a freshwater fish of the family Soleidae. Native range: Southeast Atlantic, Mauritania to south of Angola. BiologyA marine species also occurring in brackish waters and recorded from water practically free of salt in Cameroon.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHeteromycteris proboscideusFamilySoleidae (Soles)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length10.0Depth range5–37 m (16–121 ft)EnvironmentMarine; freshwater; brackish; demersal; depth range 5 - 37 mClimateTropicalDistributionSoutheast Atlantic: Mauritania to south of Angola.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceHigh, 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