HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsFatheadsTadpole sculpin Tadpole sculpin (Psychrolutes paradoxus) Scientific name: Psychrolutes paradoxus G?nther, 1861 The Tadpole sculpin (Psychrolutes paradoxus) is a marine fish of the family Psychrolutidae. Native range: North Pacific, Sea of Okhotsk and the Sea of Japan to the Bering Sea and southern Puget Sound, Washington, USA. BiologyDorsal spines (total): 10 - 12; Dorsal soft rays (total): 12-17; Anal spines: 0; Anal soft rays: 12 - 14. Caudal fin rounded.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePsychrolutes paradoxusFamilyPsychrolutidae (Fatheads)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length7.0Depth range0–1100 m (0–3609 ft)EnvironmentMarine; demersal; depth range 0 - 1100 mClimateTemperateDistributionNorth Pacific: Sea of Okhotsk and the Sea of Japan to the Bering Sea and southern Puget Sound, Washington, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries:ResilienceHigh, minimum population doubling time less than 15 months (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