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pulsing symmetrical clones; the last stage of a jellyfish before adulthood

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to move slowly, especially as a result of outside forces, with no control over direction:

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a free-swimming, flattened, ciliated, bilaterally symmetric larval form of various cnidarian species (like jellyfish)

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the process of animals travelling to a different place, usually in large numbers

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a group of small crustaceans found in nearly every freshwater and saltwater habitat

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someone who moves from one place to another rather than living in one place all of the time

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relating to a form of an insect or an animal such as a frog that has left its egg but is not yet completely developed

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Something or someone that is _____ is so good or important that you could not manage without it

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a small, simple, tube-shaped water animal