HomeFish encyclopediaRay-finned fishesCarpsSuckersModoc sucker Modoc sucker (Catostomus microps) Scientific name: Catostomus microps Rutter, 1908 The Modoc sucker (Catostomus microps) is a freshwater fish of the family Catostomidae. Native range: North America, Ash, Turner and Willow creeks (Pit River system) in north California, USA. BiologyInhabits shallow mud-bottomed pools of cool creeks.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCatostomus micropsFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length34.0Common length15.0EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Ash, Turner and Willow creeks (Pit River system) in north California, USA.Conservation status (IUCN)Endangered (EN) (B1+2c, C1)Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (tmax=18) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026