1. Marine Ecology, April 9, 2007 Invertebrates 1: Phylum Porifera, Phylum Cnidaria, and assorted worm phyla

2. Phylum Porifera Basic sponge knowledge  Water movement and feeding Focus on the choanocyte  Protection in sponges Spicules Toxins Cryptic location Camouflage Regnerative ability

3. Haliclona sp. Nudibranch: Many are predators of sponges

4. Phylum Cnidaria Polyps and medusae  Basic parts of both body forms

5. Phylum Cnidaria Alternation of generations Note that anemones have no medusa form, but do have functional gonads within polyps Note that anemones have no medusa form, but do have functional gonads within polyps

6. Phylum Cnidaria Cnidocytes/nematocyst s

7. Phylum Cnidaria, Class Anthozoa Local intertidal species Anthopleura xanthogrammica Anthopleura elegantissima

8. Anthopleura artemesia Epiactis prolifera

9. Phylum Platyhelminthes Overall body organization

10. Marine Platyhelminthes

11. Phylum Nemertea

12. Phylum Nematoda: The roundworms

13. Phylum Annelida Overall body organization

14. Phylum Annelida, Class Polychaeta Free-crawling predators Family Nereidae Family Glyceridae Photos: Morris et al.

15. Phylum Annelida, Class Polychaeta Tube worms with tentacular crowns Family Sabellidae Photo: coralsphere.com Family Serpulidae Photo: Taata Divers

16. Phylum Annelida, Class Polychaeta Family Sabellidae

17. Phylum Annelida, Class Polychaeta Deposit feeders Family Terrebellidae

18. Phylum Annelida, Class Polychaeta Tube-dwelling, mucous-bag feeder (Chaetopterus) Family Chaetopteridae Photo: Erling Svensen

19. Epitoke Nereis sp.

20. Trocophore larva Photo: NOAA

21. Phylum Sipuncula Sketch from Invertebrate Zoology course; UC Santa Cruz, Professor Baldo Marinovic