HomeFish encyclopediaRay-finned fishesCarpsSuckersKlamath largescale sucker Klamath largescale sucker (Catostomus snyderi) Scientific name: Catostomus snyderi Gilbert, 1898 The Klamath largescale sucker (Catostomus snyderi) is a freshwater fish of the family Catostomidae. Native range: North America, Klamath River drainage in Oregon and California, USA. BiologyInhabits lakes, impoundments, and rocky pools and runs of creeks and small rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCatostomus snyderiFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length55.0Common length37.5EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Klamath River drainage in Oregon and California, USA.Conservation status (IUCN)Lower Risk: near threatened (LR/nt)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Fec=64,500) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026