Lemme know what ya think.
High Res:
http://img156.imageshack.us/img156/5844/finalsigned.jpg
Sorry for my bad english…
I love the bubble and the composition, but…
It’s all a bit too… sharp, and clean.
Use the DOF and try to simulate the density of the water (with suspended particles and so on)
The foreground dolphin is too dark and the textures of the rocks are not very realistic, try using reference images.
:)
IMHO