Dont get the racoon Butterfly...

[JDigital]

That's the chance you take with Butterflies labeled as " Reef Compatible: No".....

The Raccoon Butterflyfish is a peaceful fish that may reside in a 70 gallon or larger fish-only aquarium with other butterflyfish. It should not be kept in a reef tank since it will eat invertebrates and is deemed unsafe with corals.

Sorry to hear he likes your SPS though...


EDIT: You may want to try feeding him more often, it may keep him from going after your coral when his tummy rumbles...