CEPHALOPODS

HI KIDS, MY

NAME IS

SQUIDWARD.

WANNA MEET

SOME OF MY

RELATIVES?

CHARACTERISTICS

• MOST ADVANCED OF THE MOLLUSKS

• EYES ARE HIGHLY DEVELOPED

• ACTIVE SWIMMERS – SQUIRT WATER OUT OF A SIPHON TO PROPEL THEMSELVES BACKWARDS WITH JET PROPULSION

• ARMS & TENTACLES HAVE SUCTION CUPS TO HOLD PREY

CEPHALOPOD MEANS “HEAD-FOOT”

CHARACTERISTICS

• SHARP BEAK-LIKE MOUTH TO BITE PREY

• VENOM IN SALIVA PARALYZES PREY

• CAN CHANGE COLOR RAPIDLY TO SHOW MOOD & COMMUNICATE

• SQUIRT INK TO ESCAPE FROM PREDATORS

http://www.sciencefriday.com/videos/watch/10397

BEAK OF A

SQUID

SQUID SUCKERS

http://www.sciencefriday.com/videos/watch/10397

SQUID

2 TENTACLES

8 ARMS

SIPHON

• ACTIVE SWIMMERS

• AGGRESSIVE PREDATORS

• THIN INTERNAL SHELL

ARROW SQUID

LONG-FINNED SQUID

REEF SQUID

OPALESCENT SQUID

SQUID EGGS

RMJA

G I A N T

SQUID

GIANT SQUID

GIANT SQUID

ZIGGY

OCTOPUS • MOSTLY CRAWLS WITH ITS 8 ARMS

• LIVES IN HOLES/CREVICES/BURROWS

• NOCTURNAL PREDATORS

VISCERAL MASS

8 ARMS

SIPHON

• NO SKELETAL STRUCTURE

WHITE-SPOTTED OCTOPUS

TWO-SPOTTED OCTOPUS

BROWNSTRIPE OCTOPUS

GIANT PACIFIC OCTOPUS

LONG-ARMED OCTOPUS

ATLANTIC OCTOPUS

BLUE-RINGED OCTOPUS

OCTOPUS DEN

RMJA

OCTOPUS SUCKERS

CUTTLEFISH

• SQUID-LIKE FAST SWIMMERS

FINS

8 ARMS

2 TENTACLES

• INTERNAL THICK BONE-LIKE STRUCTURE (cuttlebone) FOR SUPPORT & BUOYANCY

CUTTLEFISH

CUTTLEFISH

CUTTLEFISH

CUTTLEFISH

NAUTILUS • SLOW SWIMMERS

• MAINTAIN BUOYANCY BY FILLING SHELL CHAMBERS WITH WATER OR AIR

• BODY IS IN LARGEST CHAMBER

• CAN HAVE UP TO 90 ARMS

• LIGHT CHAMBERED SHELL

CHAMBERED NAUTILUS

CHAMBERED NAUTILUS

CHAMBERED NAUTILUS

UP CLOSE & PERSONAL WITH A SQUID

FOOT HEAD

VISCERAL MASS

FIN MANTLE EYE 8 ARMS 2 TENTACLES

UP CLOSE & PERSONAL

MOUTH JAW

RADULA ESOPHAGUS STOMACH

GONAD

INTESTINE

LIVER

SALIVARY GLANDS

INK SAC SIPHON

UP CLOSE & PERSONAL

BRAIN

SYSTEMIC HEART FOR BODY

BRANCHIAL HEARTS FOR GILLS

GILL

SHELL