The Rock beauty, Holacanthus tricolor, is a species of marine angelfish of the family Pomacanthidae, found in the western Atlantic from Georgia, United States, Bermuda, and the northern Gulf of Mexico to Rio de Janeiro, Brazil, at depths of between 3 and 92 m. Its length is up to 35 cm.
The rock beauty is inhabits rock jetties, rocky reefs and rich coral areas. Juveniles are often associated with fire corals. It feeds on tunicates, sponges, zoantharians and algae.
Coloration of the front of the body is yellow; the remaining parts of body, dorsal fin, and the front of anal fin are black. The caudal fin is entirely yellow. The front margin of the anal fin and edge of the gill cover are orange; bright blue on the upper and lower part of the iris. The young of about an inch in length are entirely yellow except for a blue-edged black spot on the upper side of the body posterior to the midpoint; with growth, the black spot soon expands to become the large black area covering most of the body and dorsal and anal fins. (text: Wikipedia)