The narrow-body righteye flounder (Nematops macrochirus) is a flatfish of the family Pleuronectidae.

It is a demersal fish that lives on saltwater bottoms at depths of between 218 and 438 metres (715 and 1,437 ft).

Its natural habitat is the waters of the Indo-West Pacific, from the Bali Strait to Northern Territory, Queensland and New South Wales in Australia.

Although Fowler described the long-fin righteye flounder, Nematops chui, in 1934, it has been shown that the morphology of N. chui overlaps completely with that of N. macrochirus, and that the long-fin righteye flounder is in fact a junior description of N. macrochirus as described by Norman in 1931.

It has a slender body, almost three times long as it is wide, with large eyes and a small symmetrical mouth.