I recommend the Netflix documentary – Chasing Coral. A must-see. This documentary does a great job depicting the rapid global coral deaths now unfolding. The amount of coral animals now being lost to ocean heating, pollution and acidification is absolutely staggering. It must be hundreds of millions of animals now, all dead. A worldwide collapse of an entire species.
Coral can live indefinitely. What we are doing is killing off one of the longest lived organisms on the planet. The cause is human. The solution exists, but despite efforts to gain public awareness and protection, this has had almost no effect because heating of the oceans is now unstoppable.