Paleo Slide Set: Coral Paleoclimatology
Caribbean star coral [Montastraea annularis]
So what do corals like this one have to do with El Nino and climate? 
Before we can answer that question, we must first look at the wonderful world 
of coral biology to learn exactly what these organisms called corals are really like. 
From a distance, corals like this massive Caribbean star coral look like single organisms. 
When we take a closer look, however, . . .

Photo Credits:
Jerry Wellington
Department of Biology, University of Houston