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Crabs crack maze to find food in study

Attenborough's plea to save 'magical' kelp forests. Video, 00:02:29Attenborough's plea to save 'magical' kelp forests

US adventurer reaches deepest points in all oceans

'Dolphin snot' collected to look at health of pod

Why is 'dolphin snot' being tested? Video, 00:00:28Why is 'dolphin snot' being tested?

Carbon-reducing underwater meadow to be planted. Video, 00:01:31Carbon-reducing underwater meadow to be planted

'Wonder plant' to be restored in UK waters

Re-tiling reefs to attract marine animals. Video, 00:01:40Re-tiling reefs to attract marine animals

Whale 'swallowing' sea lion caught on camera

Giant jellyfish spotted by divers. Video, 00:00:33Giant jellyfish spotted by divers

Mussels stressed by underwater noise from ships

The biggest seaweed bloom in the world

The Inquiry. Is the deep ocean the answer to some of our biggest problems? Audio, 23 minutesThe Inquiry

Atlantic Ocean due for a health check. Video, 00:00:55Atlantic Ocean due for a health check

Worm with eyes in head and bottom found

Atlantic Ocean 'running out of breath'

Climate change link to puffin deaths

Is there a problem with salmon farming? Video, 00:02:24Is there a problem with salmon farming?

Damaged reef granted protected status

Hundreds of thousands of viruses in oceans

Shark's-eye view of a great white hunting. Video, 00:00:53Shark's-eye view of a great white hunting

'Incredibly early' basking shark spotted

Damaged reef given permanent protection