Certain cetaceans are a group of aquatic mammals that includes orcas, also known as killer whales. Orcas are the largest species of the dolphin family and are easily recognizable by their distinctive black and white markings. They are highly intelligent and social animals, living in pods and communicating with each other through a complex system of vocalizations. Orcas are found in all oceans around the world, but they are most commonly seen in the colder waters of the Arctic and Antarctic.