PBS
Nova: Build an Island
Trace the development of a type of coral reef known as an atoll. A series of animations show you how an atoll can develop from a volcanic island.
NOAA
Noaa: Florida Keys: Coral Reefs
This effective site provides interesting information on the third largest coral reef system in the world. Physical requirements needed for coral reefs to survive are included in this site. Growth and Reproduction, coral reef types, and...