Not surprising, sadly we've seen reef health declining all across the Caribbean and Bahamas for decades. Cayman's reefs are in better condition than some other areas of the Caribbean, and the Sister Islands are better than Grand Cayman according to the study; but at least Cayman is studying and tracking the problem and trying to slow its progress.
Study shows health of Cayman reefs declining | Cayman Compass
Study shows health of Cayman reefs declining | Cayman Compass