1. Domain Eukarya
Kingdom Animalia
Phylum Mollusca
(or soft-bodied)

2. Phylum Mollusca Characteristics
*Soft-bodied invertebrate covered with protective mantle that may or may not form a hard, calcium carbonate shell
*Second largest animal phylum. Largest Marine phylum
*Have a muscular foot for movement which can be modified into tentacles
*Complete, one-way digestive tract with a mouth & anus
*Cephalization - have a distinct head with sense organs & brain
*Have a scraping, mouth-like structure called a radula*
*Go through free-swimming larval stage called trochophore

3. radula

5. Eastern mudsnail (Ilyanassa obsolete) or Common periwinkle (Littorina littorea) observation and experimentation
Get to know your subject:
Diagram and label snail using the laptop or textbook as guide
Make at least five behavioral observations
State two differences among individuals in your group
Experiment:
Create an experiment to learn something about snails in general.
On a piece of butcher paper you will write up your findings. Include:
Purpose (1 sentence)
Hypothesis (1 sentence)
Data (table and graph)
Conclusion (one paragraph. State WHY data is as it is)

7. Class 1 of 3: Bivalves (or 2 doors) most abundant phyla They include: clams oysters mussels

8. characteristics:
Byssal threads with cement
Chemoreceptor tentacles
Light detection cells

10. Class 2 of 3: Gastropods (or stomach-foot) They include: nudibranchs (or naked gills) snails limpets chiton

13. Why so bright?

16. Snail egg in leg
Killer cone snail
Snail zombies

17. Class 3 of 3: cephalopods (or head-foot) They include: Nautilus Squid octopus cuttlefish

20. Mollusca

21. Intelligent, in their own way
Camouflage video
Chromatophores video
Octopuses are smart and squishy
Octopus sneaks back to sea
Dumbo octopus: really cute
Vampire squid: weird

23. Squid Anatomy (male)
squid dissection

24. colossal squid dissection interactive