I like the close-up on the crab. Just about anything looks good if you just get close enough, eh? The textures on the creature are wonderful.
The horizon is way off though, and it's impossible to ignore even though your use of the wide aperture makes it blurred. The color contrasts are just too intense. Also the hand wouldn't be my first choice of settings for the macro. Perhaps if the beast had been on the ground instead we'd have not had the sky or the hand to distract us.