The Great Barrier Reef is suffering the most severe coral bleaching on record

Ocean heat records have been breaking for months. This is the first global evidence of the impacts on sea life. US scientists say it is the fourth global mass stress episode underway - US scientists. Ocean heat record is expected to continue to rise in the coming years. Sea life is at risk due to record-breaking coral bleaching, scientists say.

Great Barrier Reef suffering ‘most severe’ coral bleaching on record as footage shows damage 18 metres down. Marine researcher ‘devastated’ by widespread event that is affecting coral species usually resistant to bleaching. Great Barrier reef suffering'most severe bleaching' on record.

Great Barrier Reef suffering ‘most severe’ coral bleaching on record – video. Marine researcher says widespread event is 'absolutely heartbreaking' and that Australia is 'running out of time' to save the reef. Great Barrier reef suffering'most severe' event on record.

Diving at One Tree Island in one of the most highly protected parts of the Great Barrier Reef reveals the shocking extent of the latest mass bleaching event. The reef is one of Australia's most protected areas of the world's most famous coral reserves. Diving in the protected area reveals the extent of this mass bleach event.

Tour boat divers have long borne witness to mass bleaching events. Once reluctant to wade into discussions about global heating, they are now opening up. ‘Tourists ask a lot of questions’: Great Barrier Reef guides face up to bleaching tragedy. Great Barrier reef guides now open up about global warming.

Scientists believe Great Barrier Reef is about to suffer another mass bleaching. The largest coral reef in the world is at risk of becoming dead and barren. Scientists believe the reef could be about to die and barren in the coming years. The reef is one of the world's largest and largest coral reefs.