Unknown Snail

bad iirc..... wait for second opinion

Could be wrong but it looks like a small turbo...

I *think* it's a type of nerite, but that's only because I've never heard otherwise. I can definitely say they're safe, though. I have had a self-sustaining breeding population of these in my system for almost 3 years now. They're fantastic - They clean all night, and you never have to buy replacements. These together with stomatella and maybe one larger turbo are all you need to keep your rockwork clean.

Lookup sundial snails. They feast on zoas. If it is, get rid of it.

Collonista?

Looks a lot like a sundial. They are pretty easy to I'd by a spiraling checkerboard pattern. Definitly do a search to be sure. Sundials are usually pretty small

Definately a collinista(sp?). Not a sundial. It is a harmless algae grazer.

Did he say turbo? Haha

i have a few of them in my tank they do a great job cleaning and no problem with my zoas i dont think you have anything to worry about