Minous monodactylus, the grey stingfish or grey goblinfish, is a species of marine ray-finned fishes, it is the only genus in the tribe Minoini, one of the three tribes which are classified within the subfamily Synanceiinae within the family Scorpaenidae, the scorpionfishes and their relatives.

Minous monodactylus was first formally described as Scorpaena monodactyla in 1801 by the German naturalists Marcus Elieser Bloch and Johann Gottlob Theaenus Schneider, the type locality was not given.

[3] In 1876 Pieter Bleeker designated Scorpaena monodactyla as the type species of the genus Minous which had originally been described in 1829 by Georges Cuvier.

The specific name monodactylus means "one finger", alluding to the detached lowest pectoral fin ray.

There are dermal cirrhi on the upper eyeball and lower jaw but the rest of the skin is smooth.