HomeFish encyclopediaRay-finned fishesEels and MoraysMoray eelsSlenderjaw moray Slenderjaw moray (Enchelycore octaviana) Scientific name: Enchelycore octaviana Myers & Wade, 1941 The Slenderjaw moray (Enchelycore octaviana) is a marine fish of the family Muraenidae. Native range: Eastern Pacific, Gulf of California to Peru. BiologyLives between rocks, boulder strewn areas and walls. Lurks in holes, crevices and dark recesses during the day; forage in the open at night. Constantly opens and closes its mouth-an action required for respiration-not a threat.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEnchelycore octavianaFamilyMuraenidae (Moray eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length91.0Depth range3–36 m (10–118 ft)EnvironmentMarine; reef-associated; depth range 3 - 36 mClimateTropicalDistributionEastern Pacific: Gulf of California to Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026