Bleached corals recovered within seven weeks after touching a healthy clone of themselves
The story starts with a lab accident, two coral fragments that fell against each other, and shows how the team tested it.
What happened: Stanford researchers report in Science Advances that bleached corals fully recovered within seven weeks after a few days of touching a healthy fragment from the same coral colony. In a test of 10 pairs, all five bleached fragments that touched their healthy twin recovered, and all five kept a few millimeters apart died. Where the tissues touched they fused, and helpful algae and nutrients moved across within about three days. The idea came in 2025, when two fragments in Steve Palumbi's lab tipped against each other.
Why it matters: Ocean heat waves keep bleaching reefs around the world. The team calls this the fastest recovery from bleaching on record, and it could become a new tool for reef restoration.
How much agreement is there? Some disagreement over how far this can go. Nobody disputes the lab result, but it only worked between genetically identical pieces, and it has only been tried in tanks. Restoring reefs at scale is still the hard part.
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Coral bleaching
After exploring A simple touch can bring dying corals back to life in just 7 weeks, for what bleaching actually is, see Coral bleaching.
Explains how corals turn white when they lose their symbiotic algae, why a bleached coral is at risk of starving and dying, and that rising ocean temperature is the leading cause.
Wikipedia · Wade · 5 min
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