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 on the coastal ecology of Sanzhi District, New Taipei City to understand the current ecological status of the coast of the sea area. A total of 27 survey stations were completed, recording 2 species of sea anemones, 20 species of snails, 2 species of bivalves, 3 species of other molluscs; 1 species of shrimp, 4 species of hermit crabs, 14 species of crabs, 2 species of other crustaceans, 1 species of sea ginseng, and 1 species of starfish, etc. Among them, the most numerous mollusks are melanoma crab snails and mitral oysters, while crustaceans are mostly green hermit crabs and exotic sea cockroaches.