I have a Biota Aptsia Eating FileFish I am selling for $40. I noticed that it nipped at an SPS of mine so just to be safe I am letting it go. It is not eating them all the time, I just saw it happen once and I do not want to risk it. I have not seen it nibble on any other corals including LPS or Zoas. It's eating pellets and frozen food. I believe it also eats aptasia (hence the name) although I have not witnessed it happen however I don't have that many in my tank. Let me know if you want him. You can PM or text me at 248-798-9488.