Sunlight is the vital source of energy used by the countless billions of plankton which live in the world's temperate sea. Forests of giant kelp harbour thousands of animals. Sharks, sea otters, brilliantly coloured anemones, squid and exquisite leafy dragons are just a few of the other creatures that live in this cool, rich water.
click here to see where to watch or (watch here).
Ready to Watch The Blue Planet, Season 1, Episode 5?