HomeFish encyclopediaRay-finned fishesEels and MoraysMoray eelsHourglass moray Hourglass moray (Muraena clepsydra) Scientific name: Muraena clepsydra Gilbert, 1898 The Hourglass moray (Muraena clepsydra) is a marine fish of the family Muraenidae. Native range: Eastern Pacific, Gulf of California to Peru, including the Galapagos Islands. BiologyLives in rocky, boulder strewn areas and walls. Lurks in holes, crevices and dark recesses. Constantly opens and closes its mouth, an action required for respiration, not a threat.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMuraena clepsydraFamilyMuraenidae (Moray eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length120Common length60.0Depth range0–25 m (0–82 ft)EnvironmentMarine; reef-associated; depth range 0 - 25 mClimateTropicalDistributionEastern Pacific: Gulf of California to Peru, including the Galapagos Islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026