Is the spots on the body. I call the place where I brought the coral. He said is feather duster eggs. It won't harm anything. But still kind of worry. Seems like my coral is getting irritated.
Vermetid snails send out “webs” that can irritate other corals. I had a tank that had them everywhere. The next tank I had, I crushed any that I could find.
Thanks for the help guys. Look good now. I crush the snail with the wooden chopstick and scrap the side gently with a razor blade. I found the rock that gave me trouble and threw it away.