But it can still be saved, scientists said.
Greenpeace said listing the World Heritage Site as endangered would have forced the Australian government to act on climate change.
An ongoing study of their welfare delivers its latest alarming finding.
NOAA experts predict coral reefs in Florida, Hawaii and the Caribbean will be heavily impacted by global warming effects as soon as this summer.
Two thirds of the coral reef—designated a world heritage site—have been damaged, according to aerial surveys.
The Bramble Cay melomys, a small rodent, appears to have been completely wiped out.
The best way to see the oceans? Scuba diving, although snorkeling is a close second.
Watch out, crown-of-thorns starfish.
Australia's Reef is home to more than 6,000 species.