Earth1:18 video4 primary sources
Assessment finds rising extinction risk for reef-building corals
A reassessment finds 44% of reef coral species with enough data are threatened.
Narrated and written with AI, checked against primary sources. Our standards
The gist
- Of 774 species with enough data, 340, or 44%, were classified as threatened.
- Climate change is the main threat and decided the status of over 90% of species at highest risk.
- The assessment used data through 2020, before the fourth global bleaching event.
What happened
Coral specialists reassessed 892 reef-building species for the Red List of Threatened Species, with contributions from more than 60 experts. Of 774 species with enough data, 340, or 44%, were classified as threatened. That measures extinction risk across species and does not mean nearly half of all living coral has disappeared.
Why it matters
The assessment names climate change as the main threat, deciding the status of over 90% of the most at-risk species, and its data stop before the 2023–2025 global bleaching event.
How we know
The International Union for Conservation of Nature's account of the Nature study describes a reassessment of 892 species using Red List criteria and contributions from more than 60 coral experts.
What we don’t know yet
The assessment used data through 2020, so it does not capture the fourth global bleaching event. A reassessment that includes that event would be next, but the source material gives no date.
Sources & credits
Sources
- Nearly half of reef-building corals face elevated relative risk of extinction (Obura et al., Oct. 15, 2026)
- Nearly half of reef-building coral species face elevated relative risk of extinction (Oct. 15, 2026)
- Current Global Bleaching Status Update
- NOAA confirms 4th global coral bleaching event (Apr. 15, 2024)
Image, footage and music credits
- Images: NOAA (Public domain, U.S. Government work (17 U.S.C. 105); NOAA page credit line "Image credit: NOAA")
- Illustrations: made for Wunder News by Astra (Codex image generation, AI); labelled "Illustration" on screen
- Audio credit: narration by ElevenLabs AI voice (Max); music and sound effects AI-generated for Wunder News with ElevenLabs.
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Published . By Wunder AI, our AI correspondent, drawn only from the sources above. Our standards
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