During the period from March 1959 to February 1963, an investigation of marinefouling organisms was conducted at some of the important ports of China--at Chin-wangtao, Dairen, Tsingtao, Shihpu and Yulin for a period of one year, two years and three years respectively.The marine fouling organisms were collected from three series of wooden test panelswith an area of 100 cm2 or 225 cm2, exposed under the sea water at 3 levels--slightlybeneath the water surface, at 2 m and at 4 m.The first series consist of twe...