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Marine biologists have a spectacular coral reef off the coast of Tahiti in the South Pacific. The 3km-long reef at a depth of 30 metres. The scientists the array of corals and ocean vegetation previously undiscovered marine species. They have already hundreds of rose-shaped coral, some of which measure over two metres in diameter. Deep-sea diver Alexis Rosenfeld said he was when he came across the reef. He wrote: "It was magical to giant, beautiful rose corals which for as far as the eye can . It was like a work of art." Scientist Laetitia Hedouin said: "It's a very healthy reef. In the middle of the biodiversity crisis, this very good news."

Scientists the location of the Tahiti reef it is in pristine condition. Most of the world's reefs are in warmer waters. This them prone to the bleaching effects of global warming. Tahiti's reef is deep enough to it from bleaching. There is still sufficient sunlight at 30 metres for coral to grow and . UNESCO said: "We think that deeper reefs may better protected from global warming." It believes the Tahiti reef "one of the most extensive healthy coral reefs on record". It that more mapping of the deep ocean needs to be . It said: "We more about the surface of the Moon or the surface of Mars than the deeper part of the ocean."

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