I found this great series of articles by Dr. Alexander Mustard, a marine biologist and photographer at the Southampton Oceanography Centre. I thought I would share them since they gave me a great deal of knowledge about coral reefs and feature amazing photos!
http://www.soc.soton.ac.uk/GDD/hydro/atmu/ecology/menu.html
http://www.soc.soton.ac.uk/GDD/hydro/atmu/ecology/menu.html