HomeFish encyclopediaRay-finned fishesCusk eelsCusk-eelsBigeye brotula Bigeye brotula (Glyptophidium longipes) Scientific name: Glyptophidium longipes Norman, 1939 The Bigeye brotula (Glyptophidium longipes) is a marine fish of the family Ophidiidae. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 121-145; Anal spines: 0; Anal soft rays: 96 - 115. Prominent head and body with an attenuate caudal part; head bones with large, thin crests; eye equal to or greater than length of snout; opercular spine broad, flat and weak; basibranchial with 2 median and a pair of tooth patches; long gill rakers on anterior arch 21 to 41. Caudal fin rays 7-8; stem of pseudobranchial filaments dark.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGlyptophidium longipesFamilyOphidiidae (Cusk-eels)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length26.0Depth range360–825 m (1181–2707 ft)EnvironmentMarine; bathydemersal; depth range 360 - 825 mClimateDeep-waterDistributionWestern Indian Ocean: frequently encountered on the upper part of the continental slope off East Africa, reaches south to Bazaruto Island in Mozambique. Ranges extends to Durban, South Africa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026