HomeFish encyclopediaRay-finned fishesPuffers and FilefishesPuffersNarrow-headed puffer Narrow-headed puffer (Sphoeroides angusticeps) Scientific name: Sphoeroides angusticeps Jenyns, 1842 The Narrow-headed puffer (Sphoeroides angusticeps) is a marine fish of the family Tetraodontidae. Native range: Eastern Pacific, endemic to the Galapagos Islands. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 8; Anal spines: 0; Anal soft rays: 7. Body inflatable.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSphoeroides angusticepsFamilyTetraodontidae (Puffers)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Common length15.0Depth range5–18 m (16–59 ft)EnvironmentMarine; reef-associated; depth range 5 - 18 mClimateTropicalDistributionEastern Pacific: endemic to the Galapagos Islands.Conservation status (IUCN)Least Concern (LC)Threat 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