A new study does not bring good news for Australia's Great Barrier Reef.
The study, released in the Journal Nature, says the reef is being damaged by above-average ocean water temperatures over the last 20 years.
And as a result, the damage is making it hard to recover, raising the risk of what researchers call "widespread ecological collapse."
The number of new corals settling on the reef has declined by an astounding 90-percent since 2016.
Scientists have long warned that climate change could seriously harm the Great Barrier Reef.
Which is also the world's largest reef system and the only living organism that can be seen from space.