HomeFish encyclopediaRay-finned fishesPuffers and FilefishesBoxfishesIsland cowfish Island cowfish (Acanthostracion notacanthus) Scientific name: Acanthostracion notacanthus Bleeker, 1863 The Island cowfish (Acanthostracion notacanthus) is a marine fish of the family Ostraciidae. Native range: Eastern Atlantic, Azores, St. Helena and Ascension islands, Ghana, and Angola. Reported from Sao Tome Island. Mediterranean. BiologyFound over rocks, rubble and sand, mainly around islands.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcanthostracion notacanthusFamilyOstraciidae (Boxfishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length50.0Depth range3–25 m (10–82 ft)EnvironmentMarine; demersal; depth range 3 - 25 mClimateSubtropicalDistributionEastern Atlantic: Azores, St. Helena and Ascension islands, Ghana, and Angola. Reported from Sao Tome Island. Mediterranean.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Fec assumed to be > 10,000) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026