Reef Structure and Formation Sea fans Reef Formation How are Reefs Formed? Darwin's Theory Plate Tectonics Glacial Activity Where are Coral Reefs Found? Reefs in the Fossil Record Reef Structure What are the Different Reef Types? Fringing Barrier Atolls Patch Reefs Bank Reefs Reef Cycle Builders Coral Reef Builders like Hydrozoans, Sponges, and Algae Erosion Bioerosion Also see the Threats page
