I don't think the shallow DOF works to your advantage here. If the snail was facing the camera and shallow DOF was applied to blur part of the shell would look much nicer. Exposure is a bit dark. Good use of negative space in front of the snail.
Huh! For a second, I thought I'd just seen this little guy in the challenge, "Backlighting". He's kinda cute anyway. Wish his reflected image was sharper, that he was more "centered", and that his original (not reflected) shell was more in focus overall. But, that's just me. Nice image.