The only positive suggestion to keep the Reefs of the Caribbean for dying that I have seen lately is the reestablishment of the long-spined sea urchin!
Check out
http://www.fknms.nos.noaa.gov/research_monitoring/reports/diadema/diadema.html
Techniques development for the reestablishment of the long-spined sea urchin, Diadema antillarum, on two small patch reefs in the upper Florida Keys
Check out
http://www.fknms.nos.noaa.gov/research_monitoring/reports/diadema/diadema.html
Techniques development for the reestablishment of the long-spined sea urchin, Diadema antillarum, on two small patch reefs in the upper Florida Keys