Awesome! The first thing grabbed me was the colors of the crab, then I read you didn't manage to capture it's awesome colors(?!). It looks great to me! Great piece overall. Hues are on point, values look good, didn't think they could be better until I read you wanted an opinion, then the savage critic we all have inside popped up XD I guess more contrast or darker values in the shadows would emphasize all forms a bit more. But as it is, is cool. And the shrimprincess haha, love her highness gesture.
Great thanks for feed back. I guess you're right about the contrast, I see it more now on computer screen then in my sketchbook.
Cheers :)