Abstract: The water masses pattern is once of the current system around Dangkalan Sahul as an upwelling from undercurrent thus enchances and nutrified Arafura Sea. Water parcels traveling along the coast of western of Papua across the fishing area where’s kind of fishing boat working in the whole year, at presence of boundary any fishermen are confined in the Sahul Continent that is low current from south. The southern exchange window it’s subducted waters from the eastern Indian Ocean can reaches the continent, and recirculate back to the south entrance Nusa Tenggara Timur waters.