It was when I was feeding it that I noticed. I noticed it again this past time that I tried to feed it, but this time I got no feeding response. Not even an opening of the mouth. It had been over a week since the last feeding. I thought maybe someone bothered it, but it has been in my frag tank for over a month, probably two, ever since my ca/alk/mag went wacko and the clown rubbed some holes in it. Since then it has healed, created what look to be two new small mouths, and is fully inflating. Keep the suggestions coming. I have been racking my brain over this for weeks and finally gave up and posted.