The open ocean is like a vast marine desert. To survive here animals go to the extreme with epic feats of endurance and intelligence.

Originally released by BBC Worldwide Learning, 2017. Streaming video file encoded with permission for digital streaming by Infobase on April 20, 2018.

Big Blue: Introduction (1:52); --Open Ocean (4:56); -- Sperm Whales (7:12); -- Community of Castaways (4:11); -- Violent Storms (3:46); -- Ocean Currents (4:33); -- Small Ocean Animals (5:04); -- Biggest Fish in the Sea (6:02); -- Wandering Albatross (5:55); -- Polluted Waters (5:14); -- Credits: Big Blue (0:34);.