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Cephalopods

Cephalopods. DAN, EMILY, HUNTER, and ALLISON. What is a Cephalopod?. A cephalopod is a head-footed mollusk that includes: squid, octopus, chambered nautilus, and the Cuttlefish. Cephalopod is from the Greek word Cephalo , directly meaning “Head foot.”. Squid. Octopus. Chambered nautilus.

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Cephalopods

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  1. Cephalopods DAN, EMILY, HUNTER, and ALLISON

  2. What is a Cephalopod? • A cephalopod is a head-footed mollusk that includes: squid, octopus, chambered nautilus, and the Cuttlefish. • Cephalopod is from the Greek word Cephalo , directly meaning “Head foot.” Squid Octopus Chambered nautilus Cuttlefish

  3. Cuttlefish- Sepia Officinalis

  4. Cuttlefish- Food and Movement • Cuttlefish is strictly a marine animal • They have an internal shell that does not protect them from predators so they use their fleeing mechanism to avoid death • The shell is made of a calcium carbonate substance found in the bone structure of most vertebrate organisms. • The cuttlefish eats small fish and crustaceans • The cuttlefish uses its legs to constrict its prey and slowly eats it • Moves by forcefully expelling water

  5. Cuttlefish- Reproduction • Mating pairs align bodies head to head so the male can transfer a sealed package of sperm into a pouch beneath the female’s mouth. • The female hides in a quiet place to draw eggs from her cavity and pass them (the eggs) over the sperm to fertilize them.

  6. Cuttlefish- Offspring • Cuttlefish does not have a larval stage • Unlike the squid and octopus, the cuttlefish is already highly developed by the time it hatches • The lifespan of a cuttlefish is approximately 18 months. Cuttlefish Eggs Baby Cuttlefish

  7. INTERESTING FACTS- • Cuttlefish are sometimes referred to as “the chameleon of the sea” because they change color with their environment • Cuttlefish cannot see in color ,however, they can perceive the polarization of contrast • The blood of the cuttlefish is an unusual shade of green-blue blood • Cuttlefish is one of the most intelligent invertebrates • Among the largest brain to body ratios of any organism • Cuttlefish use sexual mimicry. It allows smaller males to mimic females. This lets the smaller males successfully move past dominant males without being attacked so they can mate.

  8. IMPACT ON IOWA • Iowa is mainly landlocked. All marine life is saltwater and Iowa does not have any saltwater, therefore, cephalopods do not impact Iowa or the Midwest.

  9. Cuttlefish- Videos FEEDING- http://www.arkive.org/common-cuttlefish/sepia-officinalis/video-08b.html MATING- http://www.arkive.org/giant-cuttlefish/sepia-apama/video-09a.html HATCHING- http://www.arkive.org/common-cuttlefish/sepia-officinalis/video-09b.html CAMOUFLAGE- http://videos.howstuffworks.com/wgbh-nova/2356-the-cuttlefishs-amazing-camouflagevideo.html

  10. THE END

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