Coral bleaching vs mortality
When the ocean get too hot, corals expel the zooxanthellae algae that lives in their tissue.
In Western Australia, the damage to coral reefs including the World Heritage-listed Ningaloo has eclipsed any previous bleaching events.
These microorganisms give corals their bright pastel colours and disease resistance.
Their absence creates the bleaching effect many Australians have become all too familiar with.

