Commons are usually found further offshore, where they somtimes dive 200-500 feet to feed on such species as lanternfish and flashlight fish. They also like anchovy. These bottlenose dolphin swam in front of a camera at Sea World, San Diego. Marine theme parks feature bottlenose more than any other species because they've proven to be highly adaptable to captivity. Many animal rights activists have pressured marine parks not to stock such animals, saying that it reduces a dolphin's llifespan and quality of life.
Theme parks claim otherwise.
Research data presents a mixed picture. Photo by Ken Bohn, Sea World Click here for Dolphin sounds.