I really like your subject matter and think you captured it well. But, the image has a few issues. I don't think all the brown space at the bottom enhances the image. You could cut out the bottom third, leaving just a bit of the reflection and viewers would fill the rest in in their mind without having to see the blurry sand. Where the image is cropped on the right is awkward. Why there? If you cut so close on the right, your best bet is to also crop close on the left - you are missing balance here and it feels awkward. Anyway, an interesting subject for challenge with a slight tech issue. 7 - good luck in the challenge!