Euxiphipops xanthometapon

This fish is incredibly beautiful however he grows to be quite large, 15". The Fish requires a 100 gal tank minimum, however i would recommend larger. They are Reef safe as juveniles however when they get older they get a taste for corals. So if your planning on keeping the fish and the corals i would say choose which you like more, Fish or Corals. Also at 5" the fish is already beginning to mature and loses the blue coloration and gets its Adult colors.
 
AquariaCentral.com