Can someone please ID this for me

[SirReefalot]

Hey everyone,

I just found this snail shell looking thing in a colony of my zoos. And where i picked him off of there was a big patch missing. I picked it up and still thought it was just a shell but then I went back a hour later and it moved under a rock. Let me know and thanx in advanced!

 

[Rob&Gab]

sundial snail?

 

[SirReefalot]

Yep that's it! Thank you rob!!

Perfect something else besides the nudi's I have eating my zoos! Great!

 

[Rob&Gab]

dang. :I no bueno! find them all!