These are Galapagos Sharks that I photographed off of the North-West coast of Oahu. This was in ~460 feet of water about 3 miles off the coast. The water was a little rough at the time. All the small air bubbles are from waves churning up the water.
These sharks spend most of their time on the sea floor, but if they hear splashing or anything break the surface of the water above them they come up in search of potential food. They surface in groups and circle looking for prey.