The Rock Beauty is a species of marine angelfish that inhabits reefs from the tropical western Atlantic Ocean to the Gulf of Mexico. Also commonly known as Corn Sugar, Coshubba, Rock Beasty and Yellow Nanny Angelfish, they can be found at depths between 10 and 300 feet. Adult Rock Beauties measure up to 10 inches in length, and are mostly yellow, turning blue toward the tail, with the tail itself colored yellow. The pectoral fins and ventral fins are yellow, and the lips and the edges of their dorsal fins and anal fins are dark blue. The Rock Beauty feeds primarily on sponges. It may also eat tunicates, jellyfish, and corals, as well as plankton and algae.