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Inside a Tubeworm (Hot Science) Tubeworms are animals, just as you and I are, yet they have no mouth, no stomach, no intestine, and no way to eliminate waste. How do they live? Get the inside poop on a giant tubeworm, a creature so unusual that biologists initially placed it in its own special class in the animal kingdom, the vestimentiferans. (Say that five times fast!) 
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