HomeFish encyclopediaRay-finned fishesCusk eelsCusk-eelsRainbow cusk eel Rainbow cusk eel (Ophidion iris) Scientific name: Ophidion iris Breder, 1936 The Rainbow cusk eel (Ophidion iris) is a marine fish of the family Ophidiidae. Native range: Eastern Central Pacific, Gulf of California and adjacent coast of Mexico to Banderas Bay. BiologyUncommon species ranging from the shore to 86 m depth. Found in rubble bottoms. Oviparous, with oval pelagic eggs floating in a gelatinous mass.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOphidion irisFamilyOphidiidae (Cusk-eels)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Depth range0–86 m (0–282 ft)EnvironmentMarine; demersal; depth range 0 - 86 mClimateSubtropicalDistributionEastern Central Pacific: Gulf of California and adjacent coast of Mexico to Banderas Bay.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