HomeFish encyclopediaRay-finned fishesCarpsSuckersLost River sucker Lost River sucker (Deltistes luxatus) Scientific name: Deltistes luxatus Cope, 1879 The Lost River sucker (Deltistes luxatus) is a freshwater fish of the family Catostomidae. Native range: North America, Lost River system (upper Klamath River basin) in Oregon and California, USA. BiologyFound in lakes, impoundments and deep pools of small to medium rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDeltistes luxatusFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length86.0Common length5.5EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Lost River system (upper Klamath River basin) in Oregon and California, USA.Conservation status (IUCN)Endangered (EN) (B1+2cd)Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (tmax=18; Fec=230,000) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026