HomeFish encyclopediaRay-finned fishesPerch-like fishMedusafishesMedusafish Medusafish (Icichthys lockingtoni) Scientific name: Icichthys lockingtoni Jordan & Gilbert, 1880 The Medusafish (Icichthys lockingtoni) is a marine fish of the family Centrolophidae. Native range: North Pacific, Japan and Gulf of Alaska to central Baja California, Mexico. BiologyDorsal spines (total): 3; Dorsal soft rays (total): 34-39; Anal spines: 3; Anal soft rays: 20 - 25. Caudal rounded with small notch, narrow; pectorals small, rounded. Bluish gray to brown, darker on scale pockets, fins dusky to black.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameIcichthys lockingtoniFamilyCentrolophidae (Medusafishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length46.0Depth range0–900 m (0–2953 ft)EnvironmentMarine; pelagic-oceanic; depth range 0 - 900 mClimateSubtropicalDistributionNorth Pacific: Japan and Gulf of Alaska to central Baja California, Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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