HomeFish encyclopediaRay-finned fishesPerch-like fishButterfishesSouthwest Atlantic butterfish Southwest Atlantic butterfish (Stromateus brasiliensis) Scientific name: Stromateus brasiliensis Fowler, 1906 The Southwest Atlantic butterfish (Stromateus brasiliensis) is a marine fish of the family Stromateidae. Native range: Southwest Atlantic, southern Brazil to Tierra del Fuego, Argentina. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 47-56; Anal spines: 0; Anal soft rays: 40 - 48; Vertebrae: 43 - 46. Body blue green dorsally, silvery white ventrally. Many round dark blue spots on upper half of body. Distal parts of fins darker.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameStromateus brasiliensisFamilyStromateidae (Butterfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length38.0Depth range22–133 m (72–436 ft)EnvironmentMarine; benthopelagic; depth range 22 - 133 m, usually ? - 100 mClimateSubtropicalDistributionSouthwest Atlantic: southern Brazil to Tierra del Fuego, Argentina.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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