Nemadactylus is a genus of marine ray-finned fish, traditionally regarded as belonging to the family Cheilodactylidae, the members of which are commonly known as morwongs.

[1] Nemadactylus concinnus is now considered to be a synonym of Johann Reinhold Forster's Chichla macroptera.

[3] The genus has traditionally been assigned to Cheilodactylidae, but a number of papers published in the late 1990s and early 2000s placed Nemadactylus as sister to Latris, suggesting its reassignment to the Latridae.

[4][5][6] Further genetic and morphological analyses strongly support the placement of Nemadactylus in the family Latridae, alongside almost all of the other species formerly classified in the Cheilodactylidae.

[5] Nemadactylus morwongs are separated from related taxa by having an ova; compressed body with a shallow dorsal profile to the head.