Aquarium Shot of a Shark

I'd like your opinion.

You would have satiated more of my curiosity had the picture been taken with the shark swimming toward the camera (a 45 degree angle to the lens plane is ideal). As it is, the shark is hiding against the background with his countershading, exactly what it is used for in the wild. As a result, the image loses contrast. I know blacktips don't like to come down from the surface in aquarium settings during the day, and this has proven a frustration for me as well. The second shark above confuses the image as well. Also, strive to capture the whold animal in the shot, as even the deletion of the tail causes the viewer unease.