Juvenile to adult transition may not fully occur in an aquarium. Not only does their coloration change with maturity, but during mating events as well. The mask of a male will turn a dark blue, almost black, while the female will turn a bland color.

Scientific Name: Pomacanthus imperator

Origin: Indian and Pacific Ocean
Lifespan: 21 years
Max Size: 15.75 inches
Food: small invertebrates and plants