mudskipper; goggle-eyed goby
Refers specifically to the species Boleophthalmus pectinirostris, a mudskipper found in tidal flats. The name is also famously associated with the Japanese zoologist and TV personality Masanori Hata, nicknamed ムツゴロウ.
Mudskippers are hopping on the tidal flats of the Ariake Sea.
Mudskippers are often seen on the mud at low tide.