1. 3. Meet the Lower Invertebrates Kingdom-Animalia

5. Cnidaria Life Stages: Medusa vs. Polyp

7. D) Phylum Echinodermata

8. Echinoderm Water Vascular System

9. Movement – Hydraulic Pressure System

10. Class – Stelleroidea – the Stars!

12. In some reefs (Australia, Queensland) Crown-of-Thorn outbreaks have reduced coral cover by 95% Some seastars have “issues”

13. Subclass Ophiuroidea (basket stars, brittlestars, and snake stars)

14. Class Holothuroidea (sea cucumbers)

15. Class Echinoidea (heart urchins, sand dollars, and sea urchins)