1. Volume 18, Issue 1, Pages R18-R21 (January 2008)
Coral reefs 
Nancy Knowlton 
Current Biology 
Volume 18, Issue 1, Pages R18-R21 (January 2008)
DOI: /j.cub
Copyright © 2008 Elsevier Ltd Terms and Conditions

2. Figure 1
Aerial view of the coral reefs of Heron Island, Great Barrier Reef, Australia. Photo courtesy of Ove Hoegh-Guldberg.
Current Biology  , R18-R21DOI: ( /j.cub )
Copyright © 2008 Elsevier Ltd Terms and Conditions

3. Figure 2
Diversity of coral growth forms. Photo courtesy of Ove Hoegh-Guldberg.
Current Biology  , R18-R21DOI: ( /j.cub )
Copyright © 2008 Elsevier Ltd Terms and Conditions

4. Figure 3
A partly bleached coral. The coral is still alive, but the polyps in the bleached parts have lost their symbiotic algae. Photo courtesy of David Kline.
Current Biology  , R18-R21DOI: ( /j.cub )
Copyright © 2008 Elsevier Ltd Terms and Conditions