The Blue Planet: Seas of Life - Ocean World/Frozen Seas

"Take a surprising look at the world the lurks beneath the surface of the ocean in this video, which collects two episodes of the acclaimed nature series Blue Planet. ""Ocean World"" introduces viewers to the world's seven oceans, explains the ecological balance of marine life, reveals how the moon and the stars guide the sea's activities, and offers a look at the Blue Whale, the largest mammal on Earth. ""Frozen Seas"" takes us to the beautiful but unforgiving waters of the North Pole and South Pole, introducing us to the animals that make their home in the icy waters, and explaining how they are able to survive in such a cruel climate."