Mupskippers are completely amphibious fish that can use their pectoral fins to walk on land. Being amphibious, they are uniquely adapted to intertidal habitats, unlike most fish in such habitats which survive the retreat of the tide by hiding under wet seaweed or in tidal pools.
Mudskippers have the ability to breathe through their skin and the lining of their mouth and throat, This is only possible when the mudskippers are wet, limiting them to humid habitats and requiring they keep themselves moist. This mode of breathing is known as cutaneous air breathing.
To see above and below the water, these fish have large eyes mounted on top of their heads. Their eyes work independently of each other. This allows for a large range of view. When out of water, dermal cups retain capillary water and mudskippers periodically retract their eyes beneath them to moisten them (blinking).