This paper is written on the basis of the materials obtained from the panel experiments of fouling organisms carried out in Huanghai and Bohai sea from August,1974 through June, 1985 and from the biofouling surveys on ships,wharfs and other underwater fascilities.35 species of Bryozoans recognized from 992 samples belong to 17 families in 3 orders respectively. Most of them are widely distributed over the coastal waters in China, and some species are warm water forms spread from the Ind-owest Pacific Region...