Adults are identified by the yellow lunate tail. Large males turn blue on the head that grades to green towards the tail (Ref. 48636). Body dark green to blue with vertical red to purplish red lines. Head green to blue with irregular pink to violet bands. Adults with large yellow crescent posteriorly in caudal fin and blue pectoral fins with a large elongate pink area distally. Juveniles with a large dark spot in middle of dorsal fin and a large diffuse black spot at base of caudal fin (Ref 9823).