Polychaeta

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Polychaeta A class of annelid worms in which each body segment has a pair of flattened fleshy lobes (parapodia) bearing numerous bristles (chaetae). All polychaetes are aquatic and most of them are marine. They include the fanworms (Sabella), which construct tubes of sand, etc., in which they live; and the lugworms (Arenicola) and ragworms (Nereis), which burrow in sand or mud.

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