The Emperor Angelfish, Pomacanthus imperator, also known as the Imperator Angelfish has a blue body covered with bright yellow horizontal stripes, a black mask outlined in vibrant blue lines and a yellow tail. Like many large Angelfish their appearance will change dramatically from the juvenile to adult stage. Due to aggression towards other Angelfish they are best kept singly but will do well with other larger fish. 

They are not reef safe, as they will nip at soft and stony polyp corals, sessile invertebrates and clam mantles. Diet should include a variety of spirulina, marine algae, high quality angelfish preparations, mysis and brine shrimp, 3 times daily.

Once the Emperor Angelfish reaches about six inches, it will usually reach its final coloration form.