|Male, Dahab, Egypt|
|Female, Sharm el Sheik, Egypt|
Cheilinus lunulatus can reach an average length of about 35 cm (14 in), with a maximum of 50 cm (20 in) in males. In adults, the head is large and bright green, with small spots. The lips are large and blue. The pectoral fins are yellow, while the abdominal, the anal, and caudal fins are dark blue. The body is yellow-green in the middle and dark purple in the other part. Close to the operculum is a characteristic bright-yellow marking on a black background. It has a long fringed caudal fin, resembling an old broom (hence the common name). Females and juveniles show large, dark stripes on their flanks. This wrasse feeds mainly on molluscs and hard-shelled invertebrates. It is oviparous.
Broomtail wrasses can be found on coral reefs and on adjacent sand and seagrass habitats, at depths of from 2 to 30 m (6.6 to 98.4 ft).