HomeFish encyclopediaRay-finned fishesEels and MoraysLongneck eelsNarrownecked oceanic eel Narrownecked oceanic eel (Derichthys serpentinus) Scientific name: Derichthys serpentinus Gill, 1884 The Narrownecked oceanic eel (Derichthys serpentinus) is a marine fish of the family Derichthyidae. Native range: Circumglobal, In tropical to temperate waters. Eastern Atlantic: one confirmed record near Ascension Islands. Eastern Pacific: southern California to Chile. BiologyDorsal spines: 0; Anal spines: 0. Black in color, lateral line pores light. Lateral line pores before anus about 55.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDerichthys serpentinusFamilyDerichthyidae (Longneck eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length40.0Depth range0–2000 m (0–6562 ft)EnvironmentMarine; bathypelagic; depth range 0 - 2000 m, usually 200 - 700 mClimateDeep-waterDistributionCircumglobal: In tropical to temperate waters. Eastern Atlantic: one confirmed record near Ascension Islands. Eastern Pacific: southern California to Chile.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interest SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026