The sea around Taiwan is a hot spot for shipwreck. Once the heavy oil contained in a ship has leaked due to accident, it often affects the ecology of surrounding sea and fishermen's livelihoods. However, due to the lack of information on fisheries in inter-coastal fishing, there is no clear evidence of loss of fishery and no reasonable follow-up compensation. Therefore, how to establish the data of the fishing and fishing resources and assess the damage of the fishing industry should be one of the important tasks in tackling the oil pollution accidents in the future. This study conducted a basic survey of the coastal ecology of Wanli District, New Taipei City to understand the ecological status of the coastal area. On the other hand, the fishery resources survey is carried out for the important harvested species in this area, and the basic data of fishery resources are established. These results can be used as the basis for claims for similar events in the future. This study collected six large algae harvests in Wanli District, New Taipei City. The harvests varied seasonally and annually. The main harvest time was from January to September of each year, with summer as the high season, and no harvest in late autumn and early winter.