HomeMarine aquarium fishTriggers, puffers & boxfishThornback cowfish Thornback cowfish (Lactoria fornasini) Scientific name: Lactoria fornasini Bianconi, 1846 The Thornback cowfish (Lactoria fornasini) is a marine fish of the family Ostraciidae. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 9; Anal spines: 0; Anal soft rays: 9. Caudal fin rays 10. Strong spine on middle of dorsal ridge.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLactoria fornasiniFamilyOstraciidae (Boxfishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length23.0Depth range5–80 m (16–262 ft)EnvironmentMarine; reef-associated; depth range 5 - 80 m, usually 6 - 30 mClimateTropicalDistributionIndo-West Pacific: East Africa to the Hawaiian and Rapa Islands, north to southern Japan, south to Lord Howe Island. Southeast Atlantic: sometimes reaching the southeast coast of South Africa.Conservation status (IUCN)Not EvaluatedThreat to humansVenomousUsesFisheries: of no interest; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Fec assumed to be > 10,000) More triggers, puffers & boxfishWhite-banded triggerfishRhinecanthus aculeatusSandwich isle fileCantherhines sandwichiensisSpider-eye pufferCanthigaster amboinensisHawaiian whitespotted tobyCanthigaster jactatorCrowned pufferCanthigaster coronataBristle-tail file-fishAcreichthys tomentosusSee all triggers, puffers & boxfish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026