I have had my Lemonpeel for about a year and a half. It is a bit aggressive, and very territotial. I have seen it nip on my Millepora, but it has not been distructive to the point were he is going to get thown into a QT. As far as special care, I give it none, I just feed the tank sparingly, top off the water and enjoy watching it. The colors on it are fantastic, of all the yellow fish it is by far my favorite.