Phylum Mollusca
by Elanah Wafer
1. Bivalvia
1.1. Body: Two halves to the shell
1.2. How and What it Eats: Suspension feeders
1.3. Movement: Most burrow into the sand
1.4. Picture:
2. Gastropoda
2.1. Body: Largest of classes. Shell has 3 layers. Outer fibrous to distribute shock. Middle-strong crystalline calcium carbonate for strength. Inner-smooth calcium carbonate to provide a nonabrasive surface.
2.2. How and What it Eats: Grazers and suspension feeders
2.3. Movement: Like a snail
2.4. Picture:
3. Polyplacophora (Chiton)
3.1. Body: Oval Animals, 2-8 centimeters long
3.2. How and What it Eats: Have rasp-like mouth parts to remove algae from rocks
3.3. Movement: Chitons move slowly and gradually by waves called 'pedal waves'
3.4. Picture:
4. Cephalopoda
4.1. Body: Characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot
4.2. How and What it Eats: Has a twp-part beak. They feed by capturing prey with their tentacles, drawing it into their mouth and taking bites from it.
4.3. Movement: Move by creeping, swimming with specialized fins and by squirting jets of water from an interior cavity.
4.4. Picture: