![A diver at Opal Reef, off Port Douglas.](/web/20161128092257im_/http://www.smh.com.au/content/dam/images/g/s/x/a/g/z/image.related.wideLandscape.620x349.gswy1z.11u395.png/1480111126118.jpg)
Damage to Great Barrier Reef 'worse than thought'
The government agency responsible for the Great Barrier Reef says urgent action is needed to save the world heritage site after yet-to-be-published surveys found the record coral bleaching damage earlier this year was even worse than initially thought.