Kopua minima, the Japanese deepwater clingfish, is a clingfish of the family Gobiesocidae, found in the Northwest Pacific, the East China Sea and Japan. This species reaches a length of . This species was described in 1887 by the German zoologist and paleontologist Ludwig Heinrich Philipp Döderlein from a type collected at a depth of 100-150 fathoms in Sagami Bay, Japan.
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