The wonderful world of coral reefs — Matthew Knight/Inez Torre/CNN The wonderful world of coral reefs — Matthew Knight/Inez Torre/CNN The wonderful world of coral reefs — Matthew Knight/Inez Torre/CNN The wonderful world of coral reefs — Matthew Knight/Inez Torre/CNN The wonderful underwater world of coral reefs — Sources: GBR Marine Park Authority/UNESCO Matthew Knight/Inez Torre/CNN The wonderful world of coral reefs — Matthew Knight/Inez Torre/CNN The wonderful world of coral reefs — Matthew Knight/Inez Torre/CNN Prev Next