The Great Barrier Reef is facing an unprecedented threat due to record-breaking sea surface temperatures. A recent study found that the area experienced its hottest temperature in 400 years, reaching 0.34°F (0.19°C) above the previous record high. This rapid warming is causing massive coral bleaching, posing a huge threat to the marine ecosystem and biodiversity. The study's lead author warns that the world is losing one of its natural wonders.
Source: https://www.livescience.com/animals/extremely-unusual-hottest-ocean-temperature-in-400-years-threatens-the-great-barrier-reef