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Fall 2014  
Isolated sites with significant coral disease were reported near Virginia Key (Miami-Dade County).

Fall 2015
Widespread disease was confirmed as far north as Pompano Beach down to Biscayne National Park.  

Summer 2016
The disease continued to spread to Palm Beach County and to the Upper Florida Keys (Lower Matecumbe Key).

Spring 2017
Reports of widespread disease were confirmed as far north as St. Lucie Inlet in Martin County and to the southern boundary of the Upper Florida Keys.

Spring 2018
The disease expanded into the Lower Florida Keys and was suspected in Jamaica.

Summer 2018
Signs of disease were reported in the Mexican Caribbean.

Fall 2018
Disease corals were discovered in St. Maarten.

January 2019
The disease outbreak reached beyond Key West and was reported in St. Thomas, USVI.