"Underwater scene"

For my underwater composite i chose to portray the idea of people swimming amongst a scary environment. There are battleships, boats and submarines below, while sharks lurk around above. I thought id attempt to create a bit of irony with the gold stash in the sharks mouth, necklace hanging out, and the snorkeler with the treasure chest. The central focal point is the human diving into the ocean, looking like he will end up in the sharks mouth. 

I utilized the pen tool/vector mask with most images (some from SXC, some google) and found this okay until actually placing them and trying to make them realistic. I have made other minor changes to each image also, such as reducing the opacity, adding a tinge of blue to make them fit in with the water scene.