HomeFish encyclopediaRay-finned fishesEels and MoraysMoray eelsGeometric moray Geometric moray (Gymnothorax griseus) Scientific name: Gymnothorax griseus Lacep?de, 1803 The Geometric moray (Gymnothorax griseus) is a marine fish of the family Muraenidae. Native range: Western Indian Ocean, throughout the area, including the Red Sea. BiologyHead brownish with conspicuous lines of black dots. Body lilac with brown marbling.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGymnothorax griseusFamilyMuraenidae (Moray eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length65.0Depth range40 m (131 ft)EnvironmentMarine; reef-associated; depth range ? - 40 mClimateTropicalDistributionWestern Indian Ocean: throughout the area, including the Red Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Fec = 8,000-12,000) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026