High temperatures threaten Florida’s coral reefs NOAA intern and University of Miami PhD candidate, Allyson DeMerlis, grabbles samples of corals that she planted in December of 2022 that have now already bleached fully in Miami, Flordia, U.S., July 14, 2023. REUTERS/Maria Alejandra Cardona Post navigation Previous: Florida’s rising water temperatures raise concerns for health of coral reefs -scientists