Nemadactylus valenciennesi (common names include blue morwong, queen snapper,[2] the queen fish, sea carp or southern blue morwong), is a species of marine ray-finned fish, traditionally regarded as belonging to the family Cheilodactylidae, the members of which are commonly known as morwongs.

[4] 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 valenciennesi is a large species of morwong which attains a maximum total length of 90 cm (35 in).

It has thick, fleshy lips and there is a very elongated pectoral fin ray.

However, it attains sexual maturity at the same young age of 3 to 7 years as its smaller congeners.