Hello, Let me give you the tank setup first: 55 gal, fish only (dual filters, plenty of water flow, 2 bulbs - 1 18K Hi Intensity, 1 9K) 3 damsels (1 yellow - 1+ yrs, 1 yellow tailed blue 1+ yrs, 1 indigo - 10 mos) 1 small percula clown (not true) - 10 mos 1 camel back shrimp - 8 mos 1 purple tipped sebae anemone - 8 to 9 mos I feed the anemone ZooPlex or Invertebrate Smorgasbord weekly. It has been very well, moving about, expanding, contracting. Just recently, it has contracted into a very small tight ball and almost looks as if it is turning inside out. I am concerned and wonder if I need to be worried. BTW, his color is white, no discoloration with bright purple tips and has been since I bought him. Any help would be appreciated.