BBC The Blue Planet (2001) Part 3 Open Ocean

The definitive story of the blue section of our planet - the oceans - which run from the shores to the open depths of the sea. Programmes include The Blue Planet, The Deep, Open Ocean, Frozen Seas, Seasonal Seas, Coral Seas, Tidal Seas, Coasts, Making Waves, Deep Trouble.

An epic, eight-part series that took five years to complete, The Blue Planet firmly re-establishes the BBC as the world's pre-eminent producer of top quality nature documentaries. Exploring every aspect of marine ecosystems, from coastal marshes to deep-sea trenches and from polar waters to tropical reefs, The Blue Planet is thorough and informative, yet never less than thrilling.

Part 3 Open Ocean

The third instalment 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 (later identified as a Bryde's whale) pick off a shoal of sardines until all within it have been consumed. Manta rays also gather to eat the eggs of spawning surgeonfish. Accumulations of plankton correspond to ocean 'boundaries' and consequently, schools of fish seek them out.

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