Cyanobacteria、Ligia exotica Roux、Ocypode ceratophthalmus.、Branacles、seaweed、 spiral shells（Natica (Polinices) tumidus (Swainson)、Turbo stenogyrus、Nerita albicilla、Nerita polita、Cypraeidae、Zoned Cerith）、Saccostrea mordax 、Ulva lactuca、Holothuria atra Jaeger、Holothuria leucopilota(Brandt).、sea urchin、spiral shells、OPHIUROIDEA、hermit crab、Snapping Shrimp、Portunus pelagicus、Aschaster Typicus、Sanguinolaria acuta（Ruditapes (Venerupis) philippinarum、Gafrarium tumidum (Roeding)、Chione squamosa ）、Etisus laevimanus Randall、octopus、Gymnothorax favagineus、Mudskipper.、Odontodactylus scyllarus、Epinephelus megchir、coral

The ecological system of tidal flat has a variety of communities and can be divided into tidal up area, reef and gravel area, tides gathering area, silt mixed area, coast and wetland area, and coral shallow ground area. Tidal up area is a dry area with few waves reaching there. The common creatures are Ligia exotica Roux, Cyanobacteria etc, and their distribution areas are such as the ports of all communities, the up area of Shihli and Shanshuei beach or the coast area of Fengkuei, Shihwei, Ssukang, Wukang, Tungpan, and Huching. Reef and gravel area are mostly formed of the bulge of corals or rocks. People can often see creatures such as seaweed, Branacles, spiral shell sand Saccostrea mordax （Stone clam）etc and Pengnan area and urban coast etc are all the main environments. Tide gathering area is the place that gathered water at downs in the lower place. Common creatures there are such as3Ulva lactuca、hermit crab、Holothuria atra Jaeger, Holothuria leucospilota and sea urchin etc. In the environment of mud-sand mixed area, they are mainly Snapping Shrimp, Holothuria atra Jaeger and Hsiehshou spiral shells etc. The sea areas of Shihwei and Kuanying pavilion have a big amount of Ulva lactuca, and sea areas such as Chenkuang, Shihwei and Pengnan etc are also the range of Aschaster Typicus（Ruditapes (Venerupis) philippinarum, Gafrarium tumidum (Roeding), Chione squamosa  etc ）. Coastal wetlands like vegetable wetlands are mainly places where creatures such as Mudskipper, Fiddler Crabwill appear. Coral shallow ground area is an ecological system made of corals. The common corals are Finger coral, Montipora aeqituberculata and Favia speciosa etc in places such as the sea areas of Shihwei, Chengkuang and Green Bay etc. The species appears here are octopus, Etisus laevimanus Randall,Gymnothorax favagineus and the Fish of Pengshu County－Epinephelus megchir