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DescriptionBody deep and compressed sideways with a single long dorsal fin. Maximum length 25 cm but usually less than 15 cm. Colour highly variable and depends on background and age of individual. Females and juveniles tend to be brown or greenish-brown, males are typically more brightly coloured. Both sexes have lines on the head and gill covers which are brown and pale blue in the female, bright green or blue in the male. All corkwing wrasse have a black spot in the middle of the tail stalk and a comma shaped spot behind the eye.Males build an elaborate nest of seaweed in either rock crevices or amongst seaweed or seagrasses in sediment areas. The nests are a ball or mound with an entrance hole, which the males aggressively guard. The distinctive tail spot and mark behind the eye may fade in captive individuals.