By 2021 coral cover was higher than it had been since measurements began. It increased further, staying at unprecedentedly high levels in 2022 and 2023. The coral grew more still in 2024.There is more in the story about the context of all these measurements, to the point that I'd recommend the whole thing as a précis of that entire narrative, whose spinners apparently won't be deterred by any amount of data, any time soon.
That brings us to 2025. The new data show that coral cover has dropped across 10 of 11 sectors, with two experiencing their largest one-year drop. Climate alarmists rang their bells: "Great Barrier Reef suffers worst coral decline on record," read a BBC headline. CNN: "Australia's Great Barrier Reef devastated by worst coral bleaching on record, new report finds."
Never mind that the reductions came off the record high of 2024, or that large year-to-year variations are typical. One sector saw its coral cover in 2025 reach its highest level ever. The data show coral cover across the entire reef in 2025 is "only" the fourth-highest ever recorded since systematic monitoring began. Cover across the entire reef is still higher than in 2021, which itself was higher than in any other time prior recorded year. All the highest years are in the 2020s, yet we hear nothing but doom and gloom.
-- CAV