HomeFish encyclopediaRay-finned fishesCusk eelsViviparous brotulasBeagle cusk Beagle cusk (Beaglichthys macrophthalmus) Scientific name: Beaglichthys macrophthalmus Machida, 1993 The Beagle cusk (Beaglichthys macrophthalmus) is a marine fish of the family Bythitidae. Native range: Indo-West Pacific, northern coast of Australia.to southern coast of New Guinea. BiologyDorsal spines (total): 1; Dorsal soft rays (total): 111; Anal spines: 0; Anal soft rays: 83; Vertebrae: 50. Thick skin covers the head and body. Scaly cheek. Snout, opercle and top of head without scales. Large, imbricate scales cover the body.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBeaglichthys macrophthalmusFamilyBythitidae (Viviparous brotulas)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length9.6EnvironmentMarine; reef-associatedClimateTropicalDistributionIndo-West Pacific: northern coast of Australia.to southern coast of New Guinea.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