HomeFish encyclopediaRay-finned fishesEels and MoraysMoray eelsMarbled reef-eel Marbled reef-eel (Uropterygius marmoratus) Scientific name: Uropterygius marmoratus Lacep?de, 1803 The Marbled reef-eel (Uropterygius marmoratus) is a brackish-water fish of the family Muraenidae. Native range: Indo-Pacific, East Africa to the Hawaiian, Marquesan and Tuamoto islands, north to the Yaeyamas, south to Tonga. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 0. Color whitish and densely mottled with roundish dark brown spots about the size of eye or slightly larger. Gill opening on mid side of the body. Vertebrae 133-138.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameUropterygius marmoratusFamilyMuraenidae (Moray eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length62.0Depth range1–20 m (3–66 ft)EnvironmentMarine; brackish; reef-associated; depth range 1 - 20 mClimateTropicalDistributionIndo-Pacific: East Africa to the Hawaiian, Marquesan and Tuamoto islands, north to the Yaeyamas, south to Tonga.Conservation status (IUCN)Not EvaluatedThreat 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