Distinctive Characters: Dorsal fin with 9 spines and 11 rays. Anal fin with 3 spines and 10 rays. Pectoral fin with 14-15 rays. Body depth 3.4-3.8 in standard length. Lips thick and fleshy. Postorbital head and posterior suborbital with small scales. Caudal fin of juveniles rounded; females truncate with round corners; males emarginate.
Colour: Females dark brown or black, yellow dorsally and with fine blue lines on sides. Males brown, each scale with a yellow dot. Yellow margin to operculum. White wedged-shaped area on caudal fin. Juveniles similar to females but lacking brown region of upper side.
Habitat and Biology: Commonly found on rich coral areas at depths of 7-55 m. Adults feed on coral polyps. Juveniles often seen cleaning other fishes.
Distribution: Indo-Pacific.
Remarks: Labropsis xanthonota, like other wrasses is among the first to retire to an inactive state with the approach of darkness and among the last to resume activity the following morning.