HomeFish encyclopediaRay-finned fishesPerch-like fishMackerels, tunas, bonitosPlain bonito Plain bonito (Orcynopsis unicolor) Scientific name: Orcynopsis unicolor Geoffroy Saint-Hilaire, 1817 The Plain bonito (Orcynopsis unicolor) is a brackish-water fish of the family Scombridae. BiologyAdults are neritic, confined primarily to temperate waters, but juveniles may be encountered in waters of up to 30?C. Form small schools at the surface so that the first dorsal fin stands out of the water like that of sharks, also frequently associated with birds. Feed on small fishes, especially sardines, anchovies, jacks, mackerel, bogue and others. Eggs and larvae are pelagic. Marketed canned or frozen.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOrcynopsis unicolorFamilyScombridae (Mackerels, tunas, bonitos)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length130Common length90.0EnvironmentMarine; brackish; pelagic-neritic; oceanodromousClimateSubtropicalDistributionEastern Atlantic: Oslo, Norway south to Dakar, Senegal but the range is centered in the southern Mediterranean Sea. Not known from Madeira, the Canary Islands or Cape Verde.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; gamefish: yesResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tm SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026