Trying to figure out what’s on my snail and no one local seems to know. At first I thought part of its shell was coming off because it has the exact texture of the shell and molds perfectly. But then I noticed it was opening and closing kind of like a clam. If something shades it or goes near it, it snaps closed. After a couple minutes it opens back up. I researched barnacles but can’t find any that are like this.