This image provided by the National Oceanic and Atmospheric Administration shows dead elkhorn coral on Feb. 9, 2024, at Carysfort Reef, northeast of Key Largo, Fla. Record hot seawater killed more than three-quarters of human-cultivated coral that scientists had placed in the Florida Keys in recent years in an effort to prop up a threatened species that’s highly vulnerable to climate change, researchers discovered. (Ben Edmonds/NOAA via AP)
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