Orcas can be found in all parts of the oceans, but are most plentiful in the colder waters of the Pacific and North Atlantic oceans, as well as Antarctica. Even in the same area, orca populations differ greatly. Categorized into ecotypes, they demonstrate different social behavior and food preferences.
They hunt in groups, utilizing a variety well-coordinated strategies to track and hunt their prey. Their diet is specific to where they live, consisting of fish (including sharks), sea birds, and other marine mammals (including seals, porpoises, other dolphins and whales).