In 2016 and 2017, the GBR experienced consecutive occurrences of the most severe coral bleaching in recorded history  , with shallow-water reef in the top two-thirds of the GBR affected and the severity of bleaching on individual reefs tightly correlated with the level of local heat exposure . Mass mortality of corals from these two unprecedented events resulted in larval recruitment in 2018 declining by 89% compared to historical levels . southern reefs were also affected by warming, although significantly less than in the north . Coral reefs in Australia are at very high risk of continued negative effects on ecosystem structure and function  , cultural well-being  , food provision  , coastal protection   and tourism  . If bleaching persists, an estimated 10,000 jobs and AUD$1 billion in revenue would be lost per year from declines in tourism alone .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report