Replace clean rock with infested rock until the anemones are gone. Butterflyfishes Several species of butterfly fishes will eat Aiptasia. Unfortunately, they will also eat other corals, zooanthids, anemones and tube worms. We prefer to use the Raccoon Butterfly, Chaetodon la n ula , or the Copperband Butterfly, Chelmon rostratus . Raccoons used in our facility get used to being moved from tank to tank and will begin feeding immediately after a move.
Butterflyfishes have their limitations.
Only purchase these animals once they've been in a dealers tank for at least six weeks. In fact, I recommend that you keep your Berghia, regardless of their size, in a Mason jar for at least a couple of days. They are also nocturnal and well camouflaged, making them very difficult to keep track of in even the smallest aquarium. Nudibranchs begin laying eggs at a size of about a half inch in length. The demand for Berghia far exceeds the current supply.