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

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