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.
Juvenile coloration will display c shaped white and blue stripes across a black body. Each white circle is inside one larger spanning out from the dorsal fin region. At this stage, the Juvenile Emperor Angelfish's tail is clear. They will be in this stage until they are about four inches in length.