Neoatherina australis Castelnau, 1878 Melanotaenia australis, the western rainbowfish, is a species of freshwater rainbowfish endemic to Australia's Kimberley and Pilbara,[1] Top End.

[2] The western rainbowfish (Melanotaenia, australis) is one of the most common and highly abundant freshwater fish endemic to north-western Australia;[3] It ranges from the Ashburton River in the Pilbara region of Western Australia to the Adelaide river in the Northern Territory.

[4] It shows extensive geographic variation in their color pattern.

[3] Predation is associated with the variation in color pattern in rainbow fish ( Melanotaenia australis).

[5] This Atheriniformes article is a stub.