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The Polychaetes are the largest and most diverse group of annelids. They are mostly marine but some live in freshwater or on land. There are over 5,500 known species. They have elongated segmented bodies and parapodia used for locomotion. About half live freely as predators or scavengers while the other half live permanently in burrows. They have a closed circulatory system and breathe through their parapodia or tentacles. They excrete waste through nephridia and reproduce either sexually or by external fer

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Kiki_Amamanglon_3115

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EN