HomeFish encyclopediaRay-finned fishesPuffers and FilefishesPuffersSt. Helena Sharpnose Pufferfish St. Helena Sharpnose Pufferfish (Canthigaster sanctaehelenae) Scientific name: Canthigaster sanctaehelenae G?nther, 1870 The St. Helena Sharpnose Pufferfish (Canthigaster sanctaehelenae) is a marine fish of the family Tetraodontidae. Native range: Southeast Atlantic, known only from St. Helena and Ascension islands. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 9-10; Anal spines: 0; Anal soft rays: 8 - 9. Distinguished from all Atlantic Canthigaster species (except C. supramacula) by the absence of longitudinal dark stripes on the side of the body or caudal peduncle. Distinguished from C. supramacula by the absence of a conspicuous dark spot on the dorsum.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCanthigaster sanctaehelenaeFamilyTetraodontidae (Puffers)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Depth range0–45 m (0–148 ft)EnvironmentMarine; reef-associated; depth range 0 - 45 mClimateTropicalDistributionSoutheast Atlantic: known only from St. Helena and Ascension islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, 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