Dolphins are highly intelligent marine mammals known for their playful behavior and social nature. They belong to the family Delphinidae and are found in oceans and seas around the world. Dolphins communicate using a variety of sounds, including clicks and whistles, and often live in groups called pods. These animals are known for their streamlined bodies and can swim at high speeds. Dolphins primarily feed on fish and squid, using echolocation to locate their prey. They are also known for their acrobatic displays, often leaping out of the water and performing flips.