Hey Adcolon, very cool snail, and nice colors. My suggestions would be to 20% crop on the bottom. A little more DOF would have been nice to bring in the focus on the shell, maybe some USM would help this.
Hi Adcolon - a very colourful snail capture - agree with Mike re cropping bottom and would have gone for a smaller aperature, around F16 or F22 to bring the whole subject into sharp focus.
Very nice composition with nice bright colors; love the background. Might want to crop just a wee bit off the bottom of your frame to bring your subject in closer...