By Stephen Leahy, IPS | Envolverde. Threats to coral reefs have gone from worrisome to dire. Bleaching, overfishing, pollution and disease have largely wiped out the fabulous coral communities of the Caribbean, which has lost 80 percent of its corals since the 1970s, say scientists at the 12th International Coral Reef Symposium (ICRS). (English | Spanish | Portuguese)