I am getting an emperor angel fish and I was wondering if anyone has kept them before? First, I was wondering how hard they are to keep and, secondly, have you kept them with anylive coral. I have a "fish only" aggresive tank and I have some xenia (because that is not really coral ) in it. I want to keep it in there because it definitly adds to the system, but I know that the emperor might it eat. So has anyone had an emperor with coral before? Thanks.