Distinctive Characters: Dorsal fin with 10 spines and 13 or 14 rays. Anal fin with 3 spines and 11 rays. Pectoral fin with 17 or 18 rays. Body depth 2.3-2.9 in standard length. Body relatively deep. Gill rakers on lower limb of first gill arch 60-70. Juveniles with very long pectoral fins. Caudal fin truncate or slightly emarginate.
Colour: Adults grey, in life with dusky yellow mottling on face. Juveniles black and white, without a black horizontal band from eye to operculum edge.
Habitat and Biology: Inhabits coral reefs and is usually seen solitary, sometime in large schools. Occurs at depths between 5 and 90 m. Feeds largely on fishes and crustaceans.
Distribution: Indo-West Pacific.
Remarks: Juveniles of the two species of Macolor are sometimes used in the aquarium fish trade. They can be distinguished by colour pattern (there is a white band behind the eye in Macolor niger) and pelvic fin length (very long in Macolor macularis).