zoa eating snails

[Corvette Reefer]

okay so i gave a rock to sure sirpatrick and apperitally it had a zoa eating snail on it, he sent me pics but i cant tell how to tell the difference between them and the normal lil good snails.. can someone tell me the difference asap! i gotta get these things out if i have more

[MizTanks]

Hiya Corvette~I've found this sight very helpful when it came to identifying a nasty crab I acquired via a new frag of zoa's. So glad I found it and I'm sure you'll know the sight. Show's many predators. The Sundial Snail is there :)

Zoanthid Predators, Irritators, & Diseases (http://www.zoaid.com/gallery2/main.php?g2_itemId=384)