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These fish have a peaceful temperament and in the wild are found either alone, in pairs, or in small groups, however they are territorial towards similar-looking species and may harass them.
Due to its attractive colors, the Pearlscale Butterflyfish is a well-known aquarium fish.
A 50 gallon aquarium is the minimum size recommended for them, with a water temperature of between about 74 and 80° F.
Although they can be aggressive at times, they are delicate and peaceful tankmates are required for this fish to thrive in an aquarium.
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 "living 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.
They should be fed a variety of foods that can include mysid shrimp, brine shrimp, krill, spirulina and foods containing algae.
Courtesy of Wikipedia