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In the world's largest ocean, one mighty current brings the Pacific to life in astonishing ways, from enriching rainforests to sustaining coral reefs.

From the minute mantis shrimp to the mighty sperm whale, inhabitants of the tropical Indian Ocean use their ingenuity to find food and raise their young.

In the choppy, unpredictable Atlantic Ocean, fish and mammals must face down predators and navigate the fast-changing climate in order to survive.

With temperatures mounting and sea ice melting, the creatures of the Arctic Ocean must go to new extremes to survive in a new, warmer world.

In the most remote ocean on Earth, the Global Ocean Current is at its most powerful — and its cold waters are home to some extraordinary species.