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Lesson 4 - Deep Sea Cephalopods Rvsd 91517.PDFX-3

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Giant Squid Anatomy<br />

• 3 Main body parts - mantle (torso), 8 arms, and 2 longer tentacles (longest known<br />

cephalopod tentacles<br />

• Inside surfaces of arms & tentacles lined with hundreds of subspherical suction<br />

cups, 2 - 5 cm (0.79 to 1.97 in) in diameter, each mounted on a stalk<br />

• Suckers circumference lined with sharp, finely serrated chitin rings<br />

• Common to find circular sucker scars on or close to sperm whales head that have<br />

attacked or been attacked by giant squid<br />

Background<br />

image – <strong>Sea</strong><br />

water off the<br />

coast of Italy.<br />

Image in the<br />

public domain.<br />

Image credit: Smithsonian Institution

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