A scientist told "Newsweek" he was shocked to find some and coral communities have vanished completely since 1928.
"We simply believe that human life must be prioritised over the lives of sharks," head of the state government of Queensland, Australia, said.
It is clear that despite management efforts at local, regional and national levels, a significant number of threats to the reef are getting worse.
"The tourism industry, desperate to maintain tourist numbers, is looking beyond the natural beauty of the reef because it's not quite what it was," said dive operator Tony Fontes.
"The window of opportunity to improve the reef's long-term future is now," the report urged.
"The presence of corals in these extreme mangrove habitats challenges our understanding of the conditions some corals are capable of living in," researcher Emma Camp said.
Ambitious reef-wide health check could provide valuable information to save the largest barrier reef.
Why risk the Great White Sharks while diving in the Great Barrier Reef? Now you can stay safe and dry in Scuber, Uber's new submarine that will take you around Heron Island.
"Global warming is happening. As a society, we need to understand how species and ecosystems will respond to such change," said study author Lewis Jones.
Climate change is one of the greatest threats facing coral reefs around the world today.
Recent heavy rain in Australia has washed sediment and harmful chemicals into rivers that flow into the sea where the reef is located.
Deep-water seagrass covers an area twice the size of New Jersey and stores 28 million metric tons of blue carbon.
Coral reefs around the world are facing a number of threats which are devastating coral populations.
Coral reefs around the world are coming under increasing environmental pressures.
But today's threats are far more intense than those of the past.
Rising water temperatures are killing corals—but researchers think we can stop the die-off.
Pilot desperately tried to save pair from wreckage after helicopter plunged into ocean.
The hungry critters are eating away at the reef and there's no good way to get rid of them.
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.