Thanks for compliments. It's not the greatest picture of the yellow polyps with all the light bouncing off that white piece of rock.
Chaloupa, those are one of my favorites as well, when I got it from the LFS it was just a single polyp that had attached to the empty snail shell. I put it on the bottom of my tank and didn't pay it much mind, then noticed the other day that it had multiplied in to 5 different heads. I glued it to the piece of LR in the pic, I'm hoping it will continue to spread.