Bottlenose Dolphin (Tursiops truncatus) Dolphins are playful mammals. Mammals are warm blooded and they breath air. They live in oceans and seas around the world in groups called "pods." They are very social, communicating and interacting with their friends and family all the time. Dolphins talk to each other but to us the language sounds like clicks, squeaks, pops and whistles. They also use these sounds for echolocation, which is like using sonar. They send out clicking sounds into the water, and if these clicks come back, it means that they have bounced off of an object. A dolphin can tell if a sound has echoed from a fish, squid, shark or even a boat without even seeing it. Dolphins can echolocate over a distance of at least 2,500 feet.