Coral bleaching on the Great Barrier Reef
Over the Easter break, Professor Terry Hughes - from James Cook University and convener of the National Coral Bleaching Taskforce - undertook a survey of coral bleaching across the Northern Reef by helicopter.
Professor Hughes says he found the worst bleaching in the region he has ever seen.
Professor Hughes live Tweeted the 4 day mission, with images and updates from the air.
The survey found that 95% of the reef’s in the pristine North are severely bleached.
The results of the aerial survey were by the ABC’s 7.30 Report – in this six minute story