Pola arus permukaan saat surut di sekitar muara Sungai Malalayang, Teluk Manado Pattern of surface currents during ebb tides near Malalayang River's mouth, Manado Bay

Coastal waters are one of waters areas that can be utilized for various purposes like fishery activities and tourism by and/or for a community. This utilization needs oceanographic information, especially the pattern of water mass flow. This research is descriptive in nature, i.e. to describe clearer about certain condition. Data collecting was done in October 2014 at coastal waters of Malalayang River’s mouth. Flow maps indicated that at the beginning of ebb tide period, water mass tend to flow to the west, and then turned to the east at the rest of period.