HomeFish encyclopediaRay-finned fishesPerch-like fishEelpoutsTwoline eelpout Twoline eelpout (Bothrocara brunneum) Scientific name: Bothrocara brunneum Bean, 1890 The Twoline eelpout (Bothrocara brunneum) is a marine fish of the family Zoarcidae. Native range: North Pacific, Sakhalin, Russia and Navarin Canyon in the Bering Sea to Attu Island in the Aleutian chain and Coronado Islands, Baja California, Mexico. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 100-112; Anal spines: 0; Anal soft rays: 95 - 100. Dorsal and anal fins enveloped anteriorly in soft gelatinous tissue. Uniform light gray or brown, semi translucent, blue or black margins on dorsal and anal fins; color stronger posteriorly, transparent on narrow margins of unpaired fins; light on lining on mouth; black on peritoneum.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBothrocara brunneumFamilyZoarcidae (Eelpouts)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length72.0Depth range129–2570 m (423–8432 ft)EnvironmentMarine; bathydemersal; depth range 129 - 2570 m, usually 457 - ? mClimateDeep-waterDistributionNorth Pacific: Sakhalin, Russia and Navarin Canyon in the Bering Sea to Attu Island in the Aleutian chain and Coronado Islands, Baja California, Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries:ResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Fec=1,650-2,480) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026