6. The Sponges: Phylum Porifera Sessile? Not Always Thanks to their symbiotic friend the Hermit crab
7. The Sponges: Phylum Porifera Sponges: defense many sponges produce toxins and have bright warning colouration some sponge toxins work against other sponges competing for space
19. Sea Anemone and Jellies - Phylum CnidariaClass Anthozoa Jellies not present during their lifecycle Have stinging cells called nematocysts Carnivores Can move on their pedal foot and some can swim. Corals also found within this class
26. FlatwormsPhylum Platyhelminthes Bilaterally symetrical Dorsoventrally flattened Very motile Digestive system with a mouth but no anus No circulatory system Do have an excretory system Cephalization
38. Worms with Legs - Phylum AnnelidaNereissp. Phylum also includes earth worms and leeches Segmented bodies and organs Motile or sessile Carnivores with jaws Epitoky
49. Nucella sp. 90 – 180 o Torsion Shells smooth or fringed (in sheltered waters) Some may develop fringe in the presence of predators Drill and feed on barnacles
54. Mopalia sp. 8 shell plates Bound by a leather girdle so that they can roll up into a ball Graze on algae No eyes or tentacles but have light sensors built in their shell
56. Phylum Arthropoda More than 900,000 known species Marine, fresh water, terrestrial and airborne Temperature extremes Have an exoskeleton Jointed appendages molt
57. Pycnogonid – sea spider Body not divided into distinct regions Very slow moving Appendages at the head which are used to groom the opposite sex’s legs and are used by the males to carry fertilized eggs
59. Sea StarPhylum Echinodermata Penta radial An endo skeleton made up of Calcareous ossicles Tube feet Connective tissue is mutable meaning it can rapidly change from stiff to fluid.
60. Sea StarPhylum Echinodermata Penta radial An endo skeleton made up of Calcareous ossicles Tube feet Connective tissue is mutable meaning it can rapidly change from stiff to fluid.