HomeFish encyclopediaRay-finned fishesCusk eelsCusk-eelsBighead cusk eel Bighead cusk eel (Otophidium indefatigabile) Scientific name: Otophidium indefatigabile Jordan & Bollman, 1890 The Bighead cusk eel (Otophidium indefatigabile) is a marine fish of the family Ophidiidae. Native range: Eastern Pacific, outer coast of Baja California and Gulf of California to Panama and the Galapagos Islands. BiologyUncommon species. Adults inhabit sandy bottoms of the continental shelf, up to a depth of 91 m. Oviparous, with oval pelagic eggs floating in a gelatinous mass.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOtophidium indefatigabileFamilyOphidiidae (Cusk-eels)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length11.7Depth range91 m (299 ft)EnvironmentMarine; demersal; depth range ? - 91 mClimateTropicalDistributionEastern Pacific: outer coast of Baja California and Gulf of California to Panama and the Galapagos Islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interestResilienceHigh, minimum population doubling time less than 15 months (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