1. Zablocki 2013
Mollusks

2. Mollusks: TYPES
Snails
Clams
Mussels
Squid
Octopus

3. Mollusks: Body Structure
1) Head: nervous organs
2) Visceral mass: internal organs
3) Foot: helps move the animal
4) Usually have a shell (some do not)
5) Mantle: secretes shell
6) Radula: mouth
7) Gills: breathing
8) INVERTEBRATES!!!!

4. There are seven classes of mollusks:
Animal Kingdom
Phylum Mollusca
CLASSES:
1) GASTROPODA
2)POLYPLACOPHORA
3)BIVALVIA
4)CEPHALAPODA
5-7) Monoplacophora, Aplacophora, Scaphapoda (VERY RARE)
Kingdom
Phylum
Class
Order
Family
Genus
Species

5. CLASS:GASTROPODS SNAILS LIMPETS ABALONES (ALL HAVE A SHELL) Slugs
Nudibranches
(NO SHELL)

6. CLASS: POLYPLACOPHORA
Means “many plated”
Called Chitons
Look like “pill bugs”
Eat algae found on rocks
Slow moving, these creatures many not move more than 10 ft in a year!

7. CLASS:BIVALVIA Means two shells
Well known because they are a common food source.
Clams, mussels, oysters, scallops.
Marine/Freshwater
Filter Feeders

8. How is a pearl formed? Pearls are made by clams, oysters, and mussels.
A grain of sand or other small irritant gets painfully stuck in the mantle of the creature.
The animal coats the irritant with the same material to make the shell. This makes the irritant smooth and less painful.

9. Class Cephalopoda: Free swimming
Squid, Octopods, Cuttlefish, Nautilises
Feet are confused with tentacles.
Don’t generally have shells.
Most well developed nervous systems and eyes.
Have a beak

10. Octopods: Two eyes Round head Four pairs of arms (suction cups)
Hard beak
Most intelligent of the invertebrates
Expel ink
Camoflauge
Live in dens on the sea floor

11. Octopus

12. Squid Strong swimmers Eight arms arranged in pairs Two tentacles
Two fins on their head
Live in open ocean

13. Squid

14. Cuttlefish

15. Nautilus

16. Inside Nature’s Giants: SQUID