Master Reef Guide
It’s been two decades since I last visited this celebrated dive site on Ribbon No. 3 Reef, east of Cooktown, on the outer edge of the Great Barrier Reef (GBR). During that time this World Heritage-listed natural wonder has suffered a series of environmental threats, ranging from over-fishing to agricultural run-off. Many of these are now better managed. But the reef continues to face its biggest threat by far – climate change. Well beyond the realm of local management, this global phenomenon has caused four major coral bleaching episodes since 1988, killing huge swathes of coral and degrading the habitat associated with it (see AG 142). At the time of going to press another major bleaching was underway.