Australia’s world heritage-listed reefs – Ningaloo on the west coast and the Great Barrier Reef on the east – are being hit by simultaneous coral bleaching, with teams of scientists on both coasts monitoring and tracking the event across thousands of kilometres of marine habitat. On Western Australia’s Ningaloo reef, waters have accumulated the highest amount of heat stress on record during an extended marine heatwave that has hit coral reefs all the way along the state’s vast coastline