HomeFish encyclopediaRay-finned fishesEels and MoraysDuckbill eelsLongface eel Longface eel (Saurenchelys cognita) Scientific name: Saurenchelys cognita Smith, 1989 The Longface eel (Saurenchelys cognita) is a marine fish of the family Nettastomatidae. Native range: Western Central Atlantic, North Carolina to the east coast of Florida and the northwestern Gulf of Mexico west of Mobile Bay. BiologyVertebrae: 199 - 209. Lateral line pores to anus 31-32. Color is light tan to gray, with unpaired fins edged in black posteriorly.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSaurenchelys cognitaFamilyNettastomatidae (Duckbill eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length36.0Depth range59–158 m (194–518 ft)EnvironmentMarine; demersal; depth range 59 - 158 mClimateTropicalDistributionWestern Central Atlantic: North Carolina to the east coast of Florida and the northwestern Gulf of Mexico west of Mobile Bay.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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