Yeah, it's going to be a toss up no matter how many votes you get. I've had a handful of dwarf angels over the years and never had a problem with any of them nipping at coral even other flame angels, except the flame angel I have now. It doesn't destroy corals, it just swims around taking samples of most everything, enough so that the polyp extension on my sps is almost nonexistant. But, again, it really is a case to case basis so add and observe if you decide that you must have a dwarf angel.