The acres of giant corals in pristine condition show no sign of being damaged by climate change and demonstrate just how little we know about the ocean, according to experts. 

They say it shows the need to protect the world’s remaining healthy reefs from environmental damage. 

“For once, it’s a positive story about coral reefs in the news, which is quite rare these days,” Julian Barbiere, head of marine policy at UNESCO, said to CNN. 

“The discovery suggests that there are, in fact, many more large reefs out in our ocean at depths of more than 30 meters, which have not been mapped,” Mr Barbiere added. “It’s quite a puzzling finding.”