The term 'Apex Predator of the Ocean' can be summarized by the four letter word 'ORCA'. Orcas, also known as killer whales, are the top predators in the ocean. They are highly intelligent and social animals that live in pods and hunt in groups. Orcas have a diverse diet, which includes fish, squid, sea lions, seals, and even other whales. They are found in all oceans around the world and are considered to be one of the most powerful and successful predators in the ocean.