Transcript Phylum Mollusca Class Cephalopoda

Phylum Mollusca
Class Cephalopoda
Does the Giant Squid get giant
headaches?
Cephalopod Characteristics
 All
mollusks have a muscular footcephalopods 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
Cephalopod Defense Strategies
 Can
sense colors around them and
change to blend in
 Can produce black inky substance that
helps them escape predators
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 oursnetwork of blood vessels carries blood)
 Gills to take in oxygen from water
 Beak to “chew” food into smaller pieces
Giant Squid
 Maximum
size-Females-13
meters (43 feet) long,
Males-10 meters (33 feet)
long!
 Live at depths of 300-1000
meters!
 Feed on deep sea fish and
other squids
 Found in all oceans
 Largest eyes in the worldover 30 cm (1 foot)!!
Cephalopod Video
 Click
A
here for a video clip of Jet Propulsion
cuttlefish changing color
Cool Cephalopods