A humpback whale mother and calf embark on an epic journey from tropical coral paradises to storm ravaged polar seas.
Newly discovered coral reefs in Indonesia reveal head-butting pygmy seahorses, flashing 'electric' clams and bands of sea kraits, 30-strong, which hunt in packs. Elsewhere plagues of sea urchins fell forests of giant kelp. Huge bull fur seals attack king penguins, who despite their weight disadvantage, put up a spirited defence.
Planet Earth is a 2006 television series produced by the BBC Natural History Unit. Five years in the making, it was the most expensive nature documentary series ever commissioned by the BBC and was described by its makers as 'the definitive look at the diversity of our planet'.
Each 50 minute episode features a global overview of a different biome or habitat on Earth, followed by a ten-minute featurette which takes a behind-the-scenes look.