HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsRockfishes, rockcods and thornyheadsBlackgill rockfish Blackgill rockfish (Sebastes melanostomus) Scientific name: Sebastes melanostomus Eigenmann & Eigenmann, 1890 The Blackgill rockfish (Sebastes melanostomus) is a marine fish of the family Sebastidae. Native range: Eastern Pacific, Washington, USA to central Baja California, Mexico. BiologyFound on soft bottom in deep water, but young in shallower areas. Juveniles are pelagic. Viviparous, with planktonic larvae.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSebastes melanostomusFamilySebastidae (Rockfishes, rockcods and thornyheads)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length61.0Depth range124–769 m (407–2523 ft)EnvironmentMarine; bathydemersal; depth range 124 - 769 mClimateDeep-waterDistributionEastern Pacific: Washington, USA to central Baja California, Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceVery Low, minimum population doubling time more than 14 years (tmax=90; tm=20; K=0.04-0.06) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026