1. Mollusks Kingdom Animalia, Phylum Mollusca (means “soft”)

2. What is a Mollusk? ● Mollusks are extremely diverse! ● Soft body with internal or external shell ● Ex: snails, slugs, clams, squids, and octopi ● Trochophore larva

3. ●Bilaterally symmetrical. ● Has a nervous system with a circum- oesophagal ring, ganglia and paired nerve chords. ● Has an open circulatory system with a heart and an aorta.

4. ● Has gaseous exchange organs called ctenidial gills. ● Reproduce sexually

5. ●Feed a wide range of material. ●Live in most environments. ●Despite their amazing diversity, all mollusks share some unique characteristics that define their body plan

6. ● Body plan: ● Foot – takes on many forms ● Mantle – covers the body ● Shell – (present in most) ● Visceral mass – internal organs

7. ●https://www.youtube.com/watch?v=ZGIQ2 sCgEmEhttps://www.youtube.com/watch?v=ZGIQ2 sCgEmE

8. Groups of Mollusks Three major classes of mollusks Gastropods Bivalves Cephalopods

9. Gastropod ● snails, slugs, and nudibranchs ● Shell-less or single shelled ● Move by a muscular foot ● Some are poisonous, bright colors

10. Snail

11. Spiral Mouth (radula)

12. ●https://www.youtube.com/watch?v=u4QAn CFd4iwhttps://www.youtube.com/watch?v=u4QAn CFd4iw ●https://www.youtube.com/watch?v=Go_LI z7kTokhttps://www.youtube.com/watch?v=Go_LI z7kTok

13. Slug

14. ●https://www.youtube.com/watch?v=W9EV a8p5b58https://www.youtube.com/watch?v=W9EV a8p5b58

15. Nudibranchs (sea slugs) Check out the nudibranch gallery at nationalgeographicnudibranch gallery at nationalgeographic

16. ●https://www.youtube.com/watch?v=cJE- LPcwtP8https://www.youtube.com/watch?v=cJE- LPcwtP8

17. Bivalves (things with 2 shells) Such as clams, mussels, oysters, and scallops. Bivalves are found in both freshwater and marine environments.

18. ●Burrowing Clam: https://www.youtube.com/watch?v=6JyNp PUj1ys https://www.youtube.com/watch?v=6JyNp PUj1ys ●Ask an Expert: mussels https://www.youtube.com/watch?v=eq6XO h_ML4M https://www.youtube.com/watch?v=eq6XO h_ML4M ●Pearls: https://www.youtube.com/watch?v=tIOSW AbUf74 https://www.youtube.com/watch?v=tIOSW AbUf74

19. Cephalopods ● octopi, squids, cuttlefish, and nautilus ● soft-bodied, head is attached to foot ● foot is divided into tentacles with sucking disks ● small internal shells or no shell at all ● Many release ink ● Well developed eyes ● most complex of the mollusks

20. Octopus (creeps on tentacles)

21. Octopus ●Active Predators ●Learn easily, including learning by observation of another octopus ●Problem solvers

22. Octopus ●Fast swimmers, they can jet forward by expelling water through their mantles. And their soft bodies, with no internal or external skeleton, can squeeze into impossibly small cracks and crevices where predators can't follow. ●The amazing mimic octopuses are capable of changing their color body shape to mimic other animals

23. Octopus ●Have beaklike jaws that can deliver a nasty bite, and venomous saliva, used mainly for subduing prey. ●They have been found to play with “toys” and have personalities ●They have blue blood!!

24. Intro: https://www.youtube.com/watch?v=epbJi35lzEs Octopus versus Shark: https://www.youtube.com/v/p9A-oxUMAy8https://www.youtube.com/watch?v=epbJi35lzEshttps://www.youtube.com/v/p9A-oxUMAy8 Octopus escapes jar: https://www.youtube.com/v/PmDTtkZlMwM https://www.youtube.com/v/PmDTtkZlMwM Octopus camouflage: https://www.youtube.com/v/PmDTtkZlMwM Octopus Houdini: https://www.youtube.com/watch?v=9yHIsQhVxGM https://www.youtube.com/watch?v=9yHIsQhVxGM

25. Cuttlefish (the chameleon of the sea)

26. ●https://www.youtube.com/v/2x-8v1mxpR0https://www.youtube.com/v/2x-8v1mxpR0

27. ● Nautilus is only cephalopod with shell ● Squid have a modified shell called a pen ● Like the octopus, squids also have parrot- like beaks

28. ●https://www.youtube.com/watch?v=PIheR Ycm6sIhttps://www.youtube.com/watch?v=PIheR Ycm6sI

29. Squid

30. ●Giant Squid Documentary: https://www.youtube.com/watch?v=Cs6Kq pZ1PIE https://www.youtube.com/watch?v=Cs6Kq pZ1PIE

31. ●Biology Corner ●HumanKind. AnimalKind. OneKind.