Chris Packham explores the success of the most widespread of marine mammals, the dolphin. Contrary to their amiable reputation, they are, in fact, ruthless predators. They hunt using a combination of specialized anatomy and complex communication, requiring a big brain. Chris explains the inner workings of dolphin echolocation, reveals how a pod uses body movements to communicate the location of food, and explores the strategies used by orcas during a hunt.

Originally released by BBC Worldwide Ltd, 2014. Streaming video file encoded with permission for digital streaming by Infobase on June 03, 2015.

Successful Dolphin Characteristics --(2:09) -- Dolphin Anatomy -- (3:46) -- Physical Dolphin Communication -- (2:29) -- Verbal Dolphin Communication -- (3:08) -- Dolphin Intelligence -- (3:29) -- Inter Species Cooperation -- (3:46) -- Orcas -- (3:16) -- Orca Hunting Strategies -- (4:07) -- Dolphin Conclusion -- (0:56) -- Credits: Dolphins -- (0:34) -- dolphin cooperative feeding behaviour -- (2:00) -- Dolphins cooperating with human fishers to catch fish. -- (0:22) -- dolphins: physical communication -- (2:12) -- Orca the super dolphin -- (0:26) -- dolphin anatomy -- (0:11) -- Jumping fish -- (0:11).