 They may be compatible with other butterflyfishes that have a different color pattern, but there is no guarantee that their relationship will always be peaceful.When adding more than one to a tank they have to be added simultaneously, and lots of "live rock" with shelters available for them to hide helps to reduce stress.In the wild they feed on algae, soft coral polyps and small benthic invertebrates, so therefore along with other coral-eating "Chaetodon" species they can wreak havoc on living corals in the aquarium.