HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsSculpinsMarbled sculpin Marbled sculpin (Cottus klamathensis) Scientific name: Cottus klamathensis Gilbert, 1898 The Marbled sculpin (Cottus klamathensis) is a freshwater fish of the family Cottidae. Native range: North America, Klamath River drainage in Oregon and California, USA; Pit River system from Fall River to Hat Creek in California. BiologyInhabits soft-bottomed runs of clear, cold creeks and small to medium rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCottus klamathensisFamilyCottidae (Sculpins)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length9.0Common length6.0EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Klamath River drainage in Oregon and California, USA; Pit River system from Fall River to Hat Creek in California.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tmax=5; k=0.28) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026