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Underwater at Britain's Great Reef
Naturalist Mike Dilger joins an underwater diving expedition to survey Norfolk's coastal chalk reef in a new ÃÛÑ¿´«Ã½ TV documentary.
This rare habitat is teeming with marine life including purple sea slugs, orange anemones, sea squirts, and small crabs that camouflage themselves by sticking seaweed to their shells.
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