''Polymixia'' is the only

extant Extant is the opposite of the word extinct. It may refer to: * Extant hereditary titles * Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English * Extant taxon, a taxon which is not extinct, ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of the

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

Polymixiiformes and the only genus in Polymixiidae. It contains 10 species, all of which live in deepwater marine environments. They are found in tropical and subtropical waters of the

Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe an ...

Indian Indian or Indians may refer to: Peoples South Asia * Indian people, people of Indian nationality, or people who have an Indian ancestor ** Non-resident Indian, a citizen of India who has temporarily emigrated to another country * South Asia ...

and western

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

Oceans. They are bottom-dwelling fish, found down to about . Most are relatively small fish, although one species is over in length.

Classification

There are currently 10 recognized species in this genus: * ''

Polymixia berndti ''Polymixia berndti'' is a species of beardfish found in the Indian and Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean ...

'' C. H. Gilbert, 1905 (Pacific beardfish) * '' Polymixia busakhini'' Kotlyar, 1993 (Busakhin's beardfish) * '' Polymixia fusca'' Kotthaus, 1970 * '' Polymixia japonica'' Günther, 1877 (Silver eye) * '' Polymixia longispina'' S. M. Deng, G. Q. Xiong & H. X. Zhan, 1983 * '' Polymixia lowei'' Günther, 1859 (Beardfish) * ''

Polymixia nobilis ''Polymixia nobilis'', the stout beardfish, is a species of beardfish. This species can grow over TL. ''P. nobilis'' lives on both sides of the Atlantic Ocean on gravel and sandy bottoms. Scientists do not know how they behave or reproduce. The ...

'' R. T. Lowe, 1838 (Stout beardfish) * '' Polymixia salagomeziensis'' Kotlyar, 1991 * '' Polymixia sazonovi'' Kotlyar, 1992 * '' Polymixia yuri'' Kotlyar, 1982

References

Polymixiiformes Extant Late Cretaceous first appearances Ray-finned fish genera {{Polymixiiformes-stub