Florida’s Reef Builders Declared Functionally Extinct | JQJO

A sweeping new Science study led by Shedd Aquarium biologist Ross Cunning declares Florida’s elkhorn and staghorn corals functionally extinct after the record 2023 heat wave. Divers assessed more than 52,000 colonies at nearly 400 sites and found 97.8% to 100% mortality in the Florida Keys and near Dry Tortugas—erasing decades of restoration. Researchers warn the loss of these key reef builders will unravel coastal ecosystems and weaken natural storm barriers. Small survivors persist near Miami–Broward, but currents limit recovery. Authors suggest importing heat-tolerant corals; some experts even eye gene-editing amid a broader mass bleaching.