Surface Light

As far as photo manipulations go this was done somewhat flawlessly, I thought it was a painting. The lighting and colors work well together. Where it falls apart for me is the execution of the tail manipulation. Towards the end of the tail it looks like you just got lazy and left it blank. Though that's not so much the issue because it's only noticeable if you look at it from different angles on a monitor. The tail fin however, doesn't match with the rest of piece (on the mershark?). It looks like you tried to give it a motion blur effect and ghost effect to create a sense of movement. Instead, at least for me, the blur distracts me and I zero in on it as if it were a mistake. The lighting on the sea floor doesn't match the rest of the scene in a couple places. I would take some time to makes these edges a little more crisp and match the smoothness of the sharks and woman if possible.

Long story short, I think the top half is exceptional. The bottom half falls apart.