HomeFish encyclopediaRay-finned fishesPerch-like fishButterfishesBlue butterfish Blue butterfish (Stromateus fiatola) Scientific name: Stromateus fiatola Linnaeus, 1758 The Blue butterfish (Stromateus fiatola) is a marine fish of the family Stromateidae. Native range: Eastern Atlantic, Bay of Biscay where rare and the Mediterranean southward to the Cape of Good Hope, South Africa. BiologyDorsal soft rays (total): 42-50; Anal soft rays: 33 - 38. Blue to brownish in color and darker spots dorsally, silver to whitish ventrally; juveniles with vertical bars on body and small black pelvic fins.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameStromateus fiatolaFamilyStromateidae (Butterfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length50.0Common length40.0Depth range10–70 m (33–230 ft)EnvironmentMarine; benthopelagic; depth range 10 - 70 mClimateSubtropicalDistributionEastern Atlantic: Bay of Biscay where rare and the Mediterranean southward to the Cape of Good Hope, South Africa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tm=2-3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026