Early Coral Bleaching Signs Detected Near PortMiami as Scientists Race to Protect Florida Reef Tract

As South Florida braces for what experts predict could be another record-breaking hot summer, coral scientists reported on May 28, 2026 that approximately 25% of corals near PortMiami are already showing early bleaching signs — a months earlier onset than typical bleaching seasons. Sea surface temperatures in parts of Florida Bay have reached alarming levels, prompting the University of Miami's Rescue a Reef program and partner organisations to accelerate coral rescue-and-transplant operations. Scientists and volunteers from Rock the Ocean are conducting reef restoration missions off Key Biscayne, selectively transplanting heat-tolerant 'super coral' genotypes with a higher probability of surviving increasingly frequent thermal stress events. NOAA's Florida Keys reef monitoring network has not yet issued an official bleaching alert for the broader Keys system as of late May 2026, but the early warning near Miami signals that temperatures are trending toward bleaching thresholds ahead of schedule. Since the 1970s, more than 90% of Florida's coral cover has disappeared. Scientists warn that without addressing the root cause — ocean warming driven by greenhouse gas emissions — reef restoration can only delay, not prevent, further losses. The Florida Reef Tract is the only living barrier reef in the continental United States and the third largest in the world.