Originally posted by Tizzo
Snails don't eat it, they crawl over it and they retract like feather dusters do, but they take a little longer to come back out.
Maybe I don't have the same thing pictured here, but I think I do. My turbo snails do indeed eat them, and they are unable to retract into the live rock; they seem unable to move at all. The reason I say this is that the snail glides over them, and they are gone. After that they slowly grow back over a period of about a week.
Mine look like tiny little yellow polyps, but they are brown.