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Cirratulus is a genus of marine burrowing polychaete worms. Polychaetes are segmented worms belonging to the phylum Annelida. Species within the Cirratulus genus, and the broader family Cirratulidae, are characterized by their burrowing habits. Some polychaetes, including those related to Cirratulus, feed on fine particulate matter by extending tentacles to gather material from sediments or by filtering it from the water.123

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