The damage, affecting a staggering 1,500 km of reef, showcases the increasing impact of climate change on beloved marine ecosystems. Experts warn that without urgent global action against carbon emissions, these vibrant underwater worlds face dire straits.

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World-renowned coral reefs along Western Australia's (WA) coast are experiencing a crisis like never before, suffering the worst bleaching recorded to date. This environmental emergency has been caused by the state's most intense marine heatwave, lasting from last August to May. During this period, warmer ocean temperatures have led to significant stress on the reefs, with many coral species expelling the vital algae that gives them life and color—a process called bleaching, which is often deadly.

The affected area spans an astonishing 1,500 km (932 miles) and includes spots that had previously remained untouched by climate change. The Australian Institute of Marine Science (Aims) reports that this bleaching event could be the most severe recorded, affecting both the northwestern and central reefs of WA.

According to marine scientists, the stark reality is that while the region had shown resilience in the past, climate change has taken its toll. "Areas that once offered hope because they rarely or never bleached - like Ningaloo and the Rowley Shoals - have now been severely impacted," noted marine scientist James Gilmour. Unfortunately, the iconic Ningaloo Reef, a UNESCO World Heritage site, reflected this alarming trend.

Adding to the gloom, a recent report highlighted that Australia's Great Barrier Reef—another significant coral system—has witnessed its largest coral decline in nearly forty years. Federal Environment Minister Murray Watt stressed that the damage to Ningaloo underscores the urgent necessity for both Australia and the global community to strive for net zero emissions.

As climate change continues to escalate the frequency and intensity of bleaching events, Gilmour points out the difficulty for coral reefs to recover, as they typically require 10 to 15 years for rejuvenation. The United Nations previously warned that if global temperatures rise by just 1.5°C above pre-industrial levels, an alarming 70-90% of global tropical coral reefs could face extinction. Time is of the essence for the world's coral reefs, and action is urgently needed to shield these precious ecosystems from further calamity.