I introduced a pyramid butterfly to a 180 gallon reef display tank with a resident heretofore peaceful one spot rabbit fish. While the other inhabitants peacefully accepted the newcomer, the rabbit fish continues to harass and attack the butterfly for now over two weeks. The butterfly continues to eat and looks healthy but is restrictd to an easily defended corner. I think the color similarity leads the rabbit fish to aggressively defend against what is perceived as a new con specific. Any suggestions on how to short circuit this behavior. I'm thinking a mirror to distract the rabbit fish, but am open to any suggestions. I would hate to lose the fish or remove one or the other.