I tried to ID him, but found out there were lots of very similar looking snails. Just the thought of eating a slimy snail is a bit sickening to me. I was thinking when I found him that he must be some sort of introduced snail because I had never seen one that big, but I think I do remember finding a few similar to him last year. I might have imported some in with all the leaves I picked up, just hoping that there will not be many of them. Looked to me like he could eat an entire plant by himself.