The Lunare Wrasse, Thalassoma lunare, also known as the Moon Wrasse for its yellow caudal fin shaped like a crescent moon. They exhibit a vibrant green body with unique blue/green/pink markings on its face and a luminescent yellow tail. 
The Lunare Wrasse is best kept in a tank  with a tightly sealed lid to prevent escapes, plenty of live rock hiding places, and a deep sandy substrate. 
The Lunare Wrasse will change its coloration patterns as it matures.