Korean sandlance
species of fish

The Korean sandlance (Hypoptychus dybowskii) is a species of marine ray-finned fish belonging to the family Hypoptychidae. The Korean sandlance is the only species in this monotypic family and genus and is found in the northwestern Pacific Ocean.
Taxonomy
The Korean sandlance was first formally described in 1880 by the Austrian ichthyologist Franz Steindachner with its type locality given as Peter the Great Bay. Steindachner also classified in the monospecific genus Hypoptychus and in the monogeneric family Hypoptychidae. This family described a monotypic and is included in the suborder Gasterosteoidei of the order Scorpaeniformes in the 5th edition of Fishes of the World. Other authorities treat the Gasterosteoidei as the infraorder Gasterosteales within the suborder Cottoidei or as a sister clade to the Zoarcales in the order Zoarciformes. Some authorities include the tubenose (Aulichthys japonicus) in the Hypoptychidae, but the 5th edition of Fishes of the World puts this taxon in the family Aulorhynchidae.
Etymology
The Korean sandlance's genus name, Hypoptychus, is a combination of hypo, which means "under", and ptychos, meaning "fold", an allusion to the long skin fin fold on the lower surface of the body in that taxon. The specific name likely honours the Polish biologist Benedykt Dybowski, who was a worker on the fauna of the Russian Far East.
Description
The Korean sandlance has an elongate body which has no scales, scutes or spines.
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This entry incorporates text from “Korean sandlance” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.