4. Killer Whale
Killer whales are toothed whales found in all oceans, have diverse diet. Their list of prey includes, seals, sea lions, marine mammals and other whales.
Killer whales makes group up to 40 individual for hunting. Each group use different kinds of techniques for catching different types of preys. In underwater they make sound and locate the position of aquatic preys when it bounce back. They also known for making beaching to catch seals at shores, difficult to detect them as comes along with high tides.
In arctic and Antarctic region they knocking seals and penguins from large iceberg to water so that they can catch them easily.