HomeFish encyclopediaRay-finned fishesEels and MoraysConger and garden eelsHardtail conger Hardtail conger (Gnathophis cinctus) Scientific name: Gnathophis cinctus Garman, 1899 The Hardtail conger (Gnathophis cinctus) is a marine fish of the family Congridae. Native range: Eastern Pacific, southern California, USA to Peru. BiologyA soft bottom inhabitant. Reported to burrow into loose sand, and appears to be fairly resistant to chemical preparations used for collecting fish. Bottom feeding predators devour conger eels when encountered in the open.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGnathophis cinctusFamilyCongridae (Conger and garden eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length42.0Depth range9–336 m (30–1102 ft)EnvironmentMarine; demersal; depth range 9 - 336 mClimateTropicalDistributionEastern Pacific: southern California, USA to Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026