200 of these whales, but many more have not been photographed. Based on documented predation, they are believed to feed primarily on deep-diving Pacific sleeper sharks. Three offshore killer whales who washed up dead along the coast of western British Columbia were found to have teeth worn down almost to the gums, something never seen in other Pacific orcas, a sign they had been feeding on sharks with their abrasive, sandpaper-like skin.
