I’ve kept a foxface in a reef for about 3 years (LPS, leathers, button polyps, GSP, zooanthids, shrooms) and it’s behaved most of the time. There have been instances where I’ve come home from work to find a group of button polyps gnawed down to stubs, or sat and watched as it took a couple of nips at an LPS. The polyps grew back, and its interest in any particular LPS was short-lived.