HomeFreshwater aquarium fishPuffers, gobies & brackish fishNorthern puffer Northern puffer (Sphoeroides maculatus) Scientific name: Sphoeroides maculatus Bloch & Schneider, 1801 The Northern puffer (Sphoeroides maculatus) is a brackish-water fish of the family Tetraodontidae. Native range: Western Atlantic, Newfoundland in Canada to northeastern Florida in USA. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 8; Anal spines: 0; Anal soft rays: 7. Upper side grey or brown with poorly defined black spots and saddles. Belly yellow to white. Tiny jet-black pepper spots (about 1 mm in diameter) scattered over most of pigmented surface, particularly evident on cheeks. Lower sides with a row of black, elongate, bar-like markings. No lappets on head or body (Ref 53033).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSphoeroides maculatusFamilyTetraodontidae (Puffers)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length36.0Common length20.0Depth range10–183 m (33–600 ft)EnvironmentMarine; brackish; demersal; depth range 10 - 183 mClimateTemperateDistributionWestern Atlantic: Newfoundland in Canada to northeastern Florida in USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (K=0.6) More puffers, gobies & brackish fishAtlantic mudskipperPeriophthalmus barbarusIndian glassy fishParambassis rangaTetraodon schoutedeniFresh water puffer fishTetraodon mbuPeacock gudgeonTateurndina ocellicaudaNorthern trout gudgeonMogurnda mogurndaSee all puffers, gobies & brackish fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026