1. Mollusca 4 classes near shore Gastropoda- The snails
Polyplacophora- Chitons
Bivalva-Two shelled
Cephalopoda- Squid & octope

2. Molluscan Body Soft bodies Two main parts: head-foot, visceral mass
Visceral mass: Organ systems
Head-foot: Head, foot, sensory,and foot
Visceral mass is covered by the mantle which forms the shell
Radula- teeth

3. Feeding Herbivores, carnivores,filter, detritivores or parasites
Use of a siphon or radula

4. Mollusk

6. Gastropods Examples: snails, whelks, cowries Muscular foot
Micro to 3 feet long
Foot acts as door
Some scrape algae from rocks
Conchs eat seagrasses

7. Gastropods cont. Some have a radula covered with toxins
Most have separate sexes
Internal fertilization for most

12. Slipper snails Hermaphroditic Stacked on top of each other
Young are always male
Can stay male or change to female
Cannot go back to male

14. Chitons Flat bodies- low profile 8 plates Eats algae
Found on intertidal rocks
Lethargic

16. Bivalves
Two shells
Muscles hold them together
No head
No radula

17. Feeding Cilia form currents to fill body cavity with water
Mucus traps food on the gills

19. Cephalopods Soft bodied mollusk.
Foot is divided into tentacles or arms.
Octopi, squids, cuttlefish, and nautiluses.

20. Squids, Octopods, and Cuttlefish
Bulky bodies
8 arms, 2 tentacles
Chromatophores
Jet propulsion
Ink gland

21. Cuttlefish

22. Nautilus