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The Blue Planet - Coasts
Examines the world's coastal environments, "the most dynamic of all ocean habitats". The perils of living in such places are highlighted by Marine Iguanas on the Galápagos Islands, whose diet of seaweed is quickly grabbed between crashing breakers. Many shores provide sites in which to breed...
The Blue Planet - Coral Seas
This episode is about coral reefs, which are so crowded that they play host to a perpetual battle for space, even among the coral itself. It starts life as a larva that becomes a polyp. Having multiplied, it hardens into a limestone skeleton and grows to form a reef. As the community flourishes,...
The Blue Planet - Seasonal Seas
Surveys the effects of the seasons on the world's temperate seas — the most productive on Earth. Sable Island near Nova Scotia boasts the largest colony of grey seals, which breed there when the weather is at its worst. The pups remain marooned for weeks until the spring, when they are...
The Blue Planet - Open Ocean
Focuses on life in the "marine deserts": seas that are furthest from land. Such waters contain the swiftest and most powerful of ocean hunters. A feeding frenzy is shown, as striped marlin, tuna and a Sei whale pick off a shoal of sardines until all within it have been consumed. Manta rays also...
The Blue Planet - The Blue Planet
Looks at how ocean life is regulated around the globe by currents and the varying position of the sun. Near a Pacific seamount, there is a large concentration of marine animals because when the current makes contact with the submerged rock, it forces upwards plankton and other organisms. This in...
The Blue Planet - Frozen Seas
Compares oceanic life in the Arctic and Antarctica. The winter in these regions brings temperatures of minus 50°C and frozen seas that create the biggest challenge. However, there are polynyas in the Arctic, which are free of ice owing to the pressure of currents on either side, and such...
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