I had some pulsing xenia in my tank up until a few hours ago. It has always grown like a weed to the point that I have to keep it in the center of the tank in order to keep it from spreading. Tonight I come home to my cleaner shrimp picking away at a hole the size of a half dollar in the top of the xenia. The coral was pulled down like it does in the dark and the fingers had a brownish yellow tint to them. I would assume the cleaner was picking at dead tissue, not attacking the coral??? I have heard of people having success with xenia and suddenly losing it. Is this likely what happened? Pieces of the coral were all over the tank, so I decided to chuck it rater than risk nuking my tank. Any thoughts? The only changes I have made in the past few weeks was to get rid of the clown fish who was hosting in the xenia. Could that have anything to do with it? Any and all thoughts are appreciated.