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A cuttlefish with splayed arms

Taking a Stance

You can tell the difference between a cuttle fish and its relatives the octopus and squid by looking at the eye. A cuttlefish has a signature "w" shaped pupil while an octopus has a rectangular pupil and a squid a circular one. 

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At Smithsonian Ocean, we have lesson plans, activities, and resources to help you engage your students in the wonders of our oceans.