Any of various small aquatic animals of the phylum Bryozoa that reproduce by budding and form mosslike or branching colonies permanently attached to stones or seaweed. 苔蘚蟲(chóng)，苔蘚蟲(chóng)門(mén)的小型水生動(dòng)物，通過(guò)芽生繁殖，形成象苔蘚一樣的分支群體，一直附著(zhù)在石頭或海草上。
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