I got a green bubble tip anemone (about 4" diameter) yesterday from Petco. It seemed fine until this morning when I found it shrivled and sagging hanging from the side of my live rock. I can barely see some of its 'tentacles.' I know for a fact it was fed yesterday morning at Peco.. plenty of mysis shrimp. Any suggestions? I don't want him to die and take my 3 fish with it. How can I identify if it is dying?