I normally advise against ever purchasing live aquatics from WalMart....but one day they had a score of large, blackish-brown snails in little cups for sale. I bought one--all the label said was 'snail in cup.'
I named him Spyridon (not actually sure if it's male, female, or hermaphrodite).
Spyro is about 3"long, almost that wide. The body is dark brown, almost black. His shell is brown with goldish rings. Typical roundish hell with a little upturned curl at the end.
I've been feeding him algae pellets, he seems to like them...
What kind of snail is he??? >.> I don't know how to get a picture of him on here.