1. Phylum Mollusca Class Cephalopoda
Does the Giant Squid get giant headaches?

2. Cephalopod Characteristics
All mollusks have a muscular foot-cephalopods have adapted their foot to form flexible tentacles with suckers
Largest eyes and most complex nervous system (brain) of any invertebrate
Swim using jet propulsion-organ called a siphon used to squeeze water out

3. Cephalopod Defense Strategies
Can sense colors around them and change to blend in
Can produce black inky substance that helps them escape predators

4. Cephalopod Body Systems
Have sensitive eyes-they can see brightness, size and shapes! They have about the same eyesight as sharks.
Use their tentacles to detect smells and chemicals
Closed circulatory system (like ours-network of blood vessels carries blood)
Gills to take in oxygen from water
Beak to “chew” food into smaller pieces

5. Giant Squid
Maximum size-Females-13 meters (43 feet) long, Males-10 meters (33 feet) long!
Live at depths of meters!
Feed on deep sea fish and other squids
Found in all oceans
Largest eyes in the world-over 30 cm (1 foot)!!

6. Cephalopod Video Click here for a video clip of Jet Propulsion
A cuttlefish changing color

7. Cool Cephalopods