| -- Sequencing confirms that sea urchins are more closely related to humans than fruit flies LiveScience | a flash about the anatomy of the sea urchin• An article about sea-urchin parasites |
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| 2005 , Sea-Urchins, a guide to worldwide shallow water species | Who is this person Aristotle and what about this lantern? A labeled diagram of the sea urchin's Aristotle's lantern |
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