Great exposure and detail, Andy! For my two cents, I think I like this image cropped tighter. (1/5th off of the right, and even more off the left and bottom). Generally, perfectly centered compositions only seem to support certain perfectly-symetrical subjects of a formal nature. I love that you can see every grain of sand and have preserved the details in the white objects, and have kept the original (realistic) colors. Thanks for sharing.
This is a good pic. It's sharp and the exposure level is right on. The colors from the different smaller shells and stones certainly add to the photo but I have to agree with the prior comment (alan1250) that the pic could be cropped. The larger area of stones, etc... takes away from the main subject.