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The Blue Planet

Episode 7: Tidal Seas

Duration: 58 minutes

First broadcast: on BBC One CambridgeshireLatest broadcast: on BBC Two HD

Available for 4 months

David Attenborough narrates a natural history of the oceans. This edition explores a force so powerful that it moves oceans - the tides. All over the world tides create opportunities for marine life: giant sting rays glide on currents for a rest, the fastest snail of all surfs waves in pursuit of dinner, minute crabs play football on the beach, racoons binge and, in a unique sequence, dolphins play a deadly game of catch. For in the ocean, each turn of the tide spells life or death, somewhere. Show less

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