[burgerchow]

Have had many cbs for years. They are "reef safe" in the fact that they won't eat your corals. Like anything else in the ocean, they are opportunistic eaters and will eat anything dead or alive that they can catch.
I think they are the best ornamental creatures "bang for buck" that you can put into a reef tank. I've got a mated pair of them in my 120 reef currently.
Now, if you really want to see fish disappear, try a " reef lobster"