Need help ID'ing this snail(?)

[drewsteriam5]

Not sure what this is, I think it is some type of snail, but evidently it moves crazy slow because I only ever see it in different locations randomly. However, it seems to like to stick to this one chunk of zoas which seem to be doing worse and worse while the rest of my zoas thrive. I'm not able to pull it off the zoa rock it is on easily, however I poked at it with a pipette and it definitely moved a bit. Need to know what it is asap to know whether or not to get rid of it.

Thanks

 

[m'akoyPINOY]

That's a sundial snail.And it's eating your zoas.
take it out ASAP.

 

[drewsteriam5]

Got it out. I knew I had a **** ton more zoas on that rock when I bought it. Now I just hope they can recover. The more expensive zoas seem to have survived though it may have killed a really cool paly frag I had. How do I dispatch it and should I be on the look out for more? Thanks a ton