It is not just these islands, 600 miles (965km) south-east of Miami, that are affected.
https://www.bbc.co.uk/news/world-latin-america-51035398
Since the disease first appeared off the Floridian coast in 2014, where it has now impacted 100,000 acres (40,500ha), it has made its way through the Caribbean into several countries including Jamaica, Belize, the US Virgin Islands and the Dominican Republic.
But underneath the water's stunning surface lurks a deadly disease, silently ravaging the corals which keep its denizens alive and protect the islands' pristine coastline from storms and erosion. Stony coral tissue loss disease (SCTLD) has been dubbed the biggest threat facing the tiny British territory's marine environment, and the most virulent coral sickness the world has ever seen.