SYDNEY: An "unprecedented" mass bleaching event has been recorded off Australia's western coast, scientists said on Wednesday (Mar 26), turning huge chunks of a celebrated reef system a sickly dull white. A months-long marine heatwave had "cooked" the sprawling Ningaloo Reef, ocean scientist Kate Quigley said, part of a world heritage-listed marine park renowned for vibrant corals and migrating whale sharks. Although environment officials were still verifying the scale of damage, data collected