I found this snail as a hitchhiker years ago. It's no longer in my tank but I've always wondered what it was. It was in my main display and I removed it to my basement tank in case it was problematic. In order to get a good shot of just how red it's body was I put it in a clear glass. That also means that when I try to do a google image search, I get back all kinds of different glasses and stemware. 
