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The original was posted on /r/science by /u/Wagamaga on 2025-10-15 16:19:30+00:00.

Original Title: In the Red Sea, clownfish vanish as anemones bleach. A 2023 marine heat wave in the central Red Sea caused 100% of monitored sea anemones to bleach, followed by the death of 94-100% of clownfish and 66-94% of the anemones across three surveyed reefs.