Aristotle’s lantern

anatomy

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June 18, 2026

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Aristotle's lantern is the complex, protrusible feeding apparatus found in sea urchins. It is a five-sided structure made up of teeth and supporting bones called ossicles, along with muscles that control its movement. This structure is used for scraping and chewing food. The name comes from ancient Greek writings where the shape of a sea urchin was compared to a lantern. This specialized anatomy allows sea urchins to effectively gather and process their food from the seabed.12

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echinoderm
Symmetry and body form
…of plates and muscles called Aristotle’s lantern.
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…of plates and muscles called Aristotle’s lantern.
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sea urchin
…a complex dental apparatus called Aristotle’s lantern, which also may be venomous. The teeth of Aristotle’s lantern are typically extruded to scrape algae and other food from rocks, and some urchins can excavate hiding places in coral or rock—even in steel. Sea urchins live on the ocean floor, usually on…
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…a complex dental apparatus called Aristotle’s lantern, which also may be venomous. The teeth of Aristotle’s lantern are typically extruded to scrape algae and other food from rocks, and some urchins can excavate hiding places in coral or rock—even in steel. Sea urchins live on the ocean floor, usually on…
Read More