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World’s largest reef newly discovered

Amazon River

Amazon River

The mouth of the Amazon River, where it meets the Atlantic Ocean, has been hiding what could be one of the world’s largest reef ecosystems, a reef system that stretches over thousands of square kilometres. River mouths, especially one as muddy as the Amazon, are not generally thought to be good environments for reefs, for the sediment carried by the river blocks light to photosynthetic organisms, settles and buries anchored animals.

Like most reefs around the world, this newly discovered ecosystem is not protected and is facing significant challenges from fishing, warming temperatures, ocean acidification, and offshore commercial development.

Surprisingly vibrant reef discovered in the muddy Amazon

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