1. Plankton Organisms that drift with the currents

2. Zooplankton Animal plankton – many different types Heterotrophic – primary consumers

3. Zooplankton Major type – copepods –Small crustacean

4. Plankton- Copepods

5. Zooplankton Holoplankton –Spend their entire life in plankton

7. Zooplankton Meroplankton –Only found in plankton for part of their life cycle –Larvae of benthic adults

8. Meroplankton

10. Animal Kingdom Classify similar animals into Phyla 36 Animal Phyla –Only 1 has vertebrates

12. Invertebrates Animals without backbones No internal rigid skeleton Softbodied Many have hard external coverings

13. Phylum Porifera

14. Phylum Cnidaria

15. Phylum Cnidaria - CORAL

16. Phylum Annelida

17. Phylum Arthropoda - Crustaceans Crabs, lobster, shrimp, barnacles, copepods

18. Phylum Arthropoda Class Crustacea

19. Phylum Mollusca 3 Main groups –Gastropods - snails –Bivalves- oysters, clams, mussels –Cephalopods – octopuses, squids

21. Gastropods Spiral shells Shell-less = sea slugs or nudibranchs Project head and muscular foot when moving

22. Phylum Mollusca

23. Bivalves Twin, hinged shells not very mobile Suspension feeders Gills for gas exchange

24. Phylum Mollusca

25. Cephalopods Largest of the invertebrates (59 ft squid) Foot modified into tentacles Active predators Highly evolved nervous system

26. Phylum Mollusca – Class Cephalopoda- CUTTLEFISH

27. Phylum Mollusca

29. Phylum Echinodermata Sea stars, sand dollars, brittle stars, sea urchins

31. Phylum Echinodermata