This study aims to determine the community_ structure and abundance ofphytoplankton and the factors thizt affect the estuary waters Porong Sidoarjo. Method of research zs aone with descriptive method that zs ex post facto. Analysis of water samples carried out at the Laboratory of Soil and Marine Science Laboratory University Trunojoyo. https://hollandscountryclothinges.shop/product-category/road-studs/