Unknown snail disturbing zoas

[Flippers4pups]

Found two of these guys on one of my zoa colonies, had them closed up for days. Bad? Okay?


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[shadowmonster]

It looks kind of like the Astraea snail pictured in the link below, but just to make sure you might want to post your picture in the Other Invertebrates Forum. There's a few people there that are very good at identifying things like this.

http://www.liveaquaria.com/product/prod_display.cfm?c=497+526+2844&pcatid=2844