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4:07
YouTube
National Geographic
Great Barrier Reef | Exploring Oceans
The largest living structure, the Great Barrier Reef spans more than 1,200 miles (2,000 km) of islands and submerged reefs. Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #GreatBarrierReef #ExploringOceans About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure ...
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