HomeFish encyclopediaRay-finned fishesSalmonsSalmonidsIwame trout Iwame trout (Oncorhynchus iwame) Scientific name: Oncorhynchus iwame Kimura & Nakamura, 1961 The Iwame trout (Oncorhynchus iwame) is a freshwater fish of the family Salmonidae. Native range: Asia, Japan. Species factsScientific nameOncorhynchus iwameFamilySalmonidae (Salmonids)OrderSalmoniformes (Salmons)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; demersalClimateTemperateDistributionAsia: Japan.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (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