HomeFish encyclopediaRay-finned fishesCarpsSuckersWarner sucker Warner sucker (Catostomus warnerensis) Scientific name: Catostomus warnerensis Snyder, 1908 The Warner sucker (Catostomus warnerensis) is a freshwater fish of the family Catostomidae. Native range: North America, restricted to Warner Lake basin in southern Oregon, USA. BiologyOccurs in lakes, pools and runs of streams and large irrigation canals.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCatostomus warnerensisFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length35.0Common length2.5EnvironmentFreshwater; demersal; potamodromousClimateTemperateDistributionNorth America: restricted to Warner Lake basin in southern Oregon, USA.Conservation status (IUCN)Vulnerable (VU) (D2)Threat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 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