Narrownecked oceanic eel
Encyclopedia
The narrownecked oceanic eel, Derichthys serpentinus, is a longneck eel
Longneck eel
Longneck eels or neck eels are a family, Derichthyidae, of eels. They are pelagic fishes, found in the middle and depths of most oceans...

, the only species
Monotypic
In biology, a monotypic taxon is a taxonomic group with only one biological type. The term's usage differs slightly between botany and zoology. The term monotypic has a separate use in conservation biology, monotypic habitat, regarding species habitat conversion eliminating biodiversity and...

 in the genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

Derichthys, found in all oceans in depths between 500 and 2,000 m. Their length is up to 40 cm.

The skin is scaleless and red-brown. It lives on the bottom at great depths.
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