Well, you got it preety darn great! I like the light, the details and sharpness and the BG, the floor looks a bit bussy, maybe less room at the bottom would help and while you are on it if you can, more room all arround wouldn't hurt I think ;), still as it is, is one outstanding shot as these guys are not easy at all. Congratulations!
Nice light and sharp detail. I think the image needs some room all around, except for the bottom. I do like the seaweed, but would crop to eliminate the lighter yellowish part.