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The marine bloodworm.
Ten to 15 inches long, the bloodworm comes equipped with a proboscis not ordinarily visible. The proboscis is hydrostatically ejected-i.e., water pressure is used to extend it fast the way a paper noisemaker unfurls when blown. At the end of the fleshy red-pink proboscis are four black jaws that resemble in shape the thorns on a rose bush. The jaws at the end of the proboscis grab and bite prey the way four-pronged devices at the end of long poles are used to grasp and to pluck products from the high shelves of a grocery store. In contrast to the clamworm, the bloodworm's jaws are hollow, like syringes, and are used to conduct venom into the prey.

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