This is one of the most beautiful of all the angelfish. However, the territoriality
of the emperor angelfish can make it aggressive towards other occupants of the tank.
The juveniles display several white circles against a blue background. This fish
eats raw or cooked mussels, nereis, tubifex worms, fish flesh, shrimps, lettuce,
and plenty of filamentous algae. Size: 20 cm.