HomeFish encyclopediaRay-finned fishesPerch-like fishPricklebacksPighead prickleback Pighead prickleback (Acantholumpenus mackayi) Scientific name: Acantholumpenus mackayi Gilbert, 1896 The Pighead prickleback (Acantholumpenus mackayi) is a brackish-water fish of the family Stichaeidae. Native range: North Pacific, Hokkaido, Japan to the Okhotsk and Bering seas. Arctic Ocean: Arctic coast of Canada. BiologyDorsal spines (total): 68 - 76; Dorsal soft rays (total): 0; Anal spines: 2; Anal soft rays: 41 - 48. Caudal fin slightly grayish without dark bands; roof of oral cavity with a dark region. Spines of pelvic and anal fins rigid and easily discernible from other soft rays. Eye diameter less than snout length.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcantholumpenus mackayiFamilyStichaeidae (Pricklebacks)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length70.0Depth range0–200 m (0–656 ft)EnvironmentMarine; brackish; demersal; depth range 0 - 200 mClimatePolarDistributionNorth Pacific: Hokkaido, Japan to the Okhotsk and Bering seas. Arctic Ocean: Arctic coast of Canada.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries:ResilienceVery Low, minimum population doubling time more than 14 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