A snorkeler swims among healthy Elkhorn corals off Key Largo in the Florida Keys in the early 1980s. The Elkhorn coral is one of the most important corals in the Caribbean. Current populations are struggling to recover from coral disease and bleaching.

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A snorkeler swims among healthy Elkhorn corals off Key Largo in the Florida Keys in the early 1980s. The Elkhorn coral is one of the most important corals in the Caribbean. Current populations are struggling to recover from coral disease and bleaching.