A new study found that temperatures in the Coral Sea have reached their highest levels in at least four centuries. A new study found that temperatures in the Coral Sea have reached their highest levels in at least four centuries. Great Barrier Reef (Australia), Coral Sea, Heat and Heat Waves, Wildlife Die-Offs, Coral, Reefs, Global Warming, Greenhouse Gas Emissions, Fish and Other Marine Life, Research, Nature (Journal) NYT > Science