HomeFish encyclopediaRay-finned fishesCusk eelsViviparous brotulasGrey brotula Grey brotula (Bidenichthys consobrinus) Scientific name: Bidenichthys consobrinus Hutton, 1876 The Grey brotula (Bidenichthys consobrinus) is a marine fish of the family Bythitidae. Native range: Southwest Pacific, off northern New Zealand. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 75; Anal spines: 0; Anal soft rays: 45. Small specimens greyish brown to blackish with a pale yellowish tinge; larger specimens orange or yellow with mottled brown markings.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBidenichthys consobrinusFamilyBythitidae (Viviparous brotulas)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length16.0Depth range30–178 m (98–584 ft)EnvironmentMarine; demersal; depth range 30 - 178 mClimateTemperateDistributionSouthwest Pacific: off northern New Zealand.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming Fec SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026