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Jellyfish have cells called cnidocytes, which contain nematocysts, and located on their tentacles and on their manubrium. Whenever a predator comes in contact with cnidocytes, hundreds to thousands of cnidae (filaments of the nematocysts) are ejected in the predator's direction. Nematocysts' cnidae inoculate a poisonous or allergenic mixture into the predator's body.

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10y ago

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