A group of little fish swimming in the same direction in a puddle of sandy and muddy water tidal flat at Gaomei wetlands preservation area, Taichung, Taiwan

mudskipper sediment water hoppfish fish boleophthalmus estuary periophthalmus pectinirostris shoal puddle mudhopper mud sand wetland amphibious aquatic river environment swamp ecosystem wildlife beach muddy habitat marsh amphibian species tidal soil forage modestus nature marine animal coastal gaomei same direction flat natural shuttles schole preservation little taiwan dajia city taichung school