''Acheilognathus melanogaster'', the genuine bitterling or Japanese bitterling, is a species of brackish, freshwater

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

in the genus ''

Acheilognathus ''Acheilognathus'' iis a genus of freshwater ray-finned fishes belonging to the family Acheilognathidae, the bitterlings. The fishes in this genus are found in Asia. The name is derived from the Greek ''a'', meaning "without", the Greek ''chei ...

''. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

References

melanogaster ''Melanogaster'' ("''black-bellied''") may refer to the following organisms: * Genera: ** ''Melanogaster'' (fungus), a genus of false truffles ** ''Melanogaster'' (fly), a genus of hoverflies * Species: ** ''Drosophila melanogaster ''Drosoph ...

Fish described in 1860 Taxa named by Pieter Bleeker Freshwater fish of Japan {{Acheilognathinae-stub