I have had a foxface for about 8 years. He has been fine for the majority of the time, but recently, he has resorted to munching on acros. He just bites the growth tips on almost all of them. Most of time not removing very much of the coral, but definitely leaving some damage. He does this constantly all day long. I think it the reason for this behavior is something other than hunger - I feed him with an auto feeder three times a day and he is pretty fat. But his munching causes some stress to the acros. Many of them are closed up all day, and some aren't even growing, and I think his munching is causing some of their problems. How can I get him to stop doing this? Any ideas?