Investigate the plants and animals that make up a coral reef ecosystem. Read accounts from scientists on underwater expeditions and zoom in on a coral reef from space.
http://www.discovery.com/exp/coralreef/coralreef.html
Features: Online Interactivity, Graphics/Multimedia
This essay includes information on how corals reproduce, feed, and even compete for scarce resources. There is also a section on how natural disturbances affect corals.
http://www.coris.noaa.gov/about/biology/
Features: Graphics/Multimedia