Originally Posted by Kilhullen
I posted this on the other, but maybe he just excreted waste. I saw an anemone do that once and the LFS said that was what was going on.
Mine does that sometimes. He gets all deflated and looks like he is all saggy (not as bad as yours got) but it does get really skinny. I was worried the first time, but just decided to wait. He does it every so often, so I am guessing this is his way of getting rid of waste just like some anemones do.