HomeFish encyclopediaRay-finned fishesPuffers and FilefishesPuffersPygmy puffer Pygmy puffer (Sphoeroides trichocephalus) Scientific name: Sphoeroides trichocephalus Cope, 1870 The Pygmy puffer (Sphoeroides trichocephalus) is a marine fish of the family Tetraodontidae. Native range: Eastern Pacific, Costa Rica and Panama. Reported from Nicaragua and Chile. Species factsScientific nameSphoeroides trichocephalusFamilyTetraodontidae (Puffers)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length10.5EnvironmentMarine; demersalClimateTropicalDistributionEastern Pacific: Costa Rica and Panama. Reported from Nicaragua and Chile.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