2. 2 Different Types of Corals Deep Water Coral Shallow

3. How many animals?

4. 1 Colony = many animals Each animal is a polyp Each polyp is a coral and some zooxanthellae: symbiotic photosynthetic algae

5. Growth Forms Branched Boulder Plates Fans Whips

6. Body Parts

7. Eating Polyps harpoon their food with stinging cells called nematocysts Eat zooplankton and particulate matter Coral with larger polyps even eat small fish

8. Madracis mirabilis Small polyps (3-4 mm) Narrow branches, pencil size

10. Monastera cavernosa Large polyps 11-14 mm Boulder like growth- form

12. Porities porites

13. Small polyps 3-4 mm Finger- sized branches

14. Impacts of Strong Water Flow Negative Positive

15. Impacts of Strong Water Flow Negative Strong currents or waves can break off pieces Pick colonies up and move them Flatten tentacles making it hard to eat Cover corals in sediment Positive Bring food to the polyps Carry away waste Keep sediment from settling on top

16. The experiment: Place colonies of each coral into a cage for 6-24 hours and did not feed them Moved the colonies to a reef with known water flow rates Enclosures were screened to prevent zooplankton from coming in with the water Each enclosure was fed eggs Corals ate for 20 minutes and then were preserved The # of eggs eaten was counted Question 1: What are the dependent and independent variables in this experiment? List 2 controlled variables.