''Gymnapogon'' is a genus of fish in the family

Apogonidae Cardinalfishes are a family, Apogonidae, of ray-finned fishes found in the Atlantic, Indian, and Pacific Oceans; they are chiefly marine, but some species are found in brackish water and a few (notably ''Glossamia'') are found in fresh water. A h ...

. They are native to the Indo-West Pacific and central

Pacific Oceans 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 ...

, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long and have semitransparent bodies without scales. The genus name is a compound noun formed by combining the Greek ''gymnos'' meaning "naked", referring to the lack of scales in the type species, ''Gymnapogon japonicus'', and '' Apogon'', the type genus of the Apogonidae. One species, the B-spot cardinalfish (''Gymnapogon urospilotus''), is notable for its larvae being rather large, conspicuous and fast-swimming.

Species

There are currently 9 recognized species in this genus:Mabuchi, K., Fraser, T.H., Song, H., Azuma, Y. & Nishida, M. (2014)
Revision of the systematics of the cardinalfishes (Percomorpha: Apogonidae) based on molecular analyses and comparative reevaluation of morphological characters.
''Zootaxa, 3846 (2): 151–203.'' * '' Gymnapogon africanus''

J. L. B. Smith James Leonard Brierley Smith (26 September 1897 – 8 January 1968) was a South African ichthyologist, organic chemist, and university professor. He was the first to identify a taxidermied fish as a coelacanth, at the time thought to be long ex ...

, 1954 (Crystal cardinalfish) * ''

Gymnapogon annona ''Gymnapogon'' is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long an ...

'' ( Whitley, 1936) (Naked cardinalfish) * ''

Gymnapogon foraminosus ''Gymnapogon'' is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long an ...

'' ( S. Tanaka (I), 1915) * '' Gymnapogon janus'' T. H. Fraser, 2016 Fraser, T.H. (2016): A new species of cardinalfish (''Gymnapogon'', Gymnapogonini, Apogonidae, Percomorpha) from the Philippines. ''Zootaxa, 4107 (3): 431-438.'' * ''

Gymnapogon japonicus ''Gymnapogon'' is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long an ...

Regan The family name Regan, along with its cognates O'Regan, O Regan, Reagan, and O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin. The meaning is likely to have originated in ancient Gaelic ''ri'' ...

, 1905 * ''

Gymnapogon melanogaster ''Gymnapogon'' is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long an ...

'' Gon & Golani, 2002 * ''

Gymnapogon philippinus ''Gymnapogon'' is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long an ...

'' ( Herre, 1939) (Philippines cardinalfish) * ''

Gymnapogon urospilotus ''Gymnapogon'' is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long and ha ...

'' Lachner, 1953 (B-spot cardinalfish) * ''

Gymnapogon vanderbilti ''Gymnapogon'' is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long an ...

'' ( Fowler, 1938) (Vanderbilt's cardinalfish)

References

Pseudaminae Marine fish genera Taxa named by Charles Tate Regan {{Kurtiformes-stub