In 2024, record ocean heat triggered mass coral bleaching, affecting 84% of coral reef areas worldwide. Marine heatwaves, now three times more frequent due to climate change, are killing algae that sustain corals. Scientists warn this may cause irreversible damage to marine ecosystems.
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- 84% of world’s coral reefs affected by extreme heat stress.
- 2024 marked as hottest year globally, oceans heating rapidly.
- Marine heatwaves have tripled over recent decades.
- Coral bleaching happens when heat kills algae living on corals.
- Without algae, corals lose color, food source, and eventually die.
- Bleaching weakens reefs, impacting marine biodiversity and fisheries.
- Coral reefs vital for coastal protection and global ecosystems.
- Scientists call this a global bleaching crisis, not a local issue.
- Damage may be irreversible if ocean warming continues.
- Urgent climate action needed to reduce ocean temperatures and save reefs.




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