The rich colors of emperor angelfish make them a vibrant version of royalty. They are curious fish that will come and greet their human visitors. However this unique coloring is not shared with all ages. Young emperor angelfish, like the one in this image, have such a different color scheme than the adults that they are easily mistaken for a different species. The adult coloring has blue and yellow stripes and a dark stripe surrounding the eye. Adults and juveniles also act differently: young fish may also take up a job as a cleaner fish and eat the parasites off of other nearby fish.