The purpose of this study is to establish the construction technique of man-made rocky coast with various marine organisms. From this viewpoint, the field observations on vertical distribution ofmarine organisms were carried out in three man-made rocky coasts at Osaka Bay and Tohban coast.
As a result, the vertical distribution of marine organisms varies with the rate of seawater flow due to wave and current. And, between critical inhabiting height of marine organism and the rate of seawater flow, there is the linear relation approximately. It is suitable for the beach play in the place which faced the open sea side in the man-made rocky coast.
