Sharkwater by underwater photographer Rob Stewart casts sharks in an unconventional light: sharks are not predators but preys, facing the danger of extinction. In the marine reserves of Costa Rica and Ecuador, Stewart exposes the shark-poaching industry that supplies shark fins to Asia where shark fin soup is a delicacy. The film contains nightmarish images of sharks getting eviscerated alive and, with their fins cut off, thrown back into the ocean. The film also features scenes of sharks swimming with breathtaking grace. In one scene, a school of hammer-head sharks gather near the ocean surface, and, as the camera follows from below their silhouettes floating in the blue sea, their peculiar figures, often described grotesque, look serene and almost angelic. Stewart became obsessed with sharks when he was a child, and learned scuba-diving so that he could 'fly with sharks' underwater. When he swims near sharks, he manages to lower his heart rate (to 40 beats per minute) not to warn them; otherwise, they do not come near him since they are incredibly sensitive and attuned to their environment. The film also discusses how the survival of humans depends on the well-being of sharks. For the last 400 million years, sharks have been integral to the marine ecosystem that supplies the majority of oxygen on earth, and, if the marine ecosystem changes due to the extinction of sharks, the supply of oxygen will inevitably change. The film, both mesmerizing and sobering, challenges the stereotypes about sharks, and helps us appreciate this beautiful species.