HomeFish encyclopediaRay-finned fishesCarpsSuckersShortnose sucker Shortnose sucker (Chasmistes brevirostris) Scientific name: Chasmistes brevirostris Cope, 1879 The Shortnose sucker (Chasmistes brevirostris) is a freshwater fish of the family Catostomidae. Native range: North America, Upper Klamath Lake and its tributaries in Oregon and California, USA. BiologyUsually found near vegetation around lake margin. Spawning occurs in lake tributaries.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChasmistes brevirostrisFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length64.0Common length40.0EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Upper Klamath Lake and its tributaries in Oregon and California, USA.Conservation status (IUCN)Endangered (EN) (B1+2c)Threat to humansHarmlessResilienceVery Low, minimum population doubling time more than 14 years (Assuming tm>10; Fec=72,500) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026