HomeFish encyclopediaRay-finned fishesEels and MoraysMoray eelsBlacktail moray Blacktail moray (Gymnothorax kolpos) Scientific name: Gymnothorax kolpos B?hlke & B?hlke, 1980 The Blacktail moray (Gymnothorax kolpos) is a marine fish of the family Muraenidae. Native range: Western Atlantic, Straits of Florida in USA and Gulf of Mexico. BiologyLarge, greenish brown with white ocellated spots that are small on head and anterior, becoming larger and fewer posteriorly.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGymnothorax kolposFamilyMuraenidae (Moray eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length91.0Depth range120 m (394 ft)EnvironmentMarine; demersal; depth range 120 - 120 mClimateTropicalDistributionWestern Atlantic: Straits of Florida in USA and Gulf of Mexico.Conservation status (IUCN)Not EvaluatedThreat 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