Predatory dolphins, also known as orcas, are a species of dolphin that hunt and feed on other marine animals. They are the largest species of dolphin, growing up to 32 feet in length and weighing up to 11 tons. Orcas are found in all oceans around the world, but they are most commonly seen in the colder waters of the Arctic and Antarctic. They have a diverse diet, including fish, squid, sea birds, and even other marine mammals such as seals and whales. Orcas are highly intelligent and social animals, living in large family groups called pods.