... the global coral bleaching and die off that began in 2014 may now be a practically permanent ocean feature of the presently destabilized world climate system. [emphasis mine]
The global coral bleaching event the began in 2014 won't end. La Nina is over, and oceans are still too hot.
Despite La Nina, Ocean surfaces have not cooled enough to end the worst global coral.... What this means is that many reefs, including the Great Barrier Reef, are again under a rising risk of bleaching and mortality for the coming months. This is unheard of. Never before has a mass coral bleaching event lasted for so long or extended through the period of natural variability related ocean surface cooling called La Nina.
... the likely range for annual global temperatures over the next 5 years will be about 1 to 1.3 C above 1880s averages. These readings are so high (the warmest in 115,000 years) and have risen so much, in such a geologically short span of time, that many of the world’s more sensitive species are now being pushed out of their habitats and are undergoing considerable heat-related mortality events.