HomeFish encyclopediaRay-finned fishesCusk eelsCusk-eelsEarspot cusk eel Earspot cusk eel (Ophidion fulvum) Scientific name: Ophidion fulvum Hildebrand & Barton, 1949 The Earspot cusk eel (Ophidion fulvum) is a brackish-water fish of the family Ophidiidae. Native range: Eastern Pacific, Costa Rica to northern Peru. BiologyUncommon species found in mangrove areas, on muddy and sandy bottoms. Oviparous, with oval pelagic eggs floating in a gelatinous mass.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOphidion fulvumFamilyOphidiidae (Cusk-eels)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Common length12.0Depth range0–20 m (0–66 ft)EnvironmentBrackish; demersal; depth range 0 - 20 mClimateTropicalDistributionEastern Pacific: Costa Rica to northern Peru.Conservation status (IUCN)Near Threatened (NT)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