The most fearsome toothed whale is the killer whale' orca. With its 44 sharp teeth' orca eats fish, penguins, seals, sharks-and other whales. Orcas can swim as fast as a car driving along a street. They can leap as high as a double-decker bus. Orcas live in family groups, called pods, of up to 20. They often work as a team when hunting. By Sarah Curley.