Domain EukaryaKingdom Animalia

Phylum Mollusca(or soft-bodied)

Phylum MolluscaCharacteristics*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

radula

Eastern mudsnail (Ilyanassa obsolete) orCommon 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 groupExperiment:• 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)

Class 1 of 3:Bivalves (or 2 doors)most abundant phyla

They include:clamsoystersmussels

characteristics:Byssal threads with cementChemoreceptor tentaclesLight detection cells

http://www.youtube.com/watch?v=90WJBA8qBKY

Class 2 of 3:Gastropods (or stomach-foot)

They include:nudibranchs (or naked gills)snailslimpetschiton

Why so bright?

• Snail egg in leg• Killer cone snail• Snail zombies

Class 3 of 3:cephalopods (or head-foot)

They include:NautilusSquidoctopuscuttlefish

Mollusca

Intelligent, in their own way• Camouflage video• Chromatophores video• Octopuses are smart and squish

y• Octopus sneaks back to sea• Dumbo octopus: really cute• Vampire squid: weird

Squid Anatomy (male)

squid dissection

colossal squid dissection interactive