Mudskippers are about 6 to 8 inches long. They live in mud burrows in tidal mangrove swamps in tropical Africa, southeast Asia, and Oceania. Mudskippers spend at least three quarters of their time on shore, walking, jumping, and even climbing the roots of mangroves in search of insects to eat. They move with the aid of long, leglike pectoral fins. In many species the pelvic fins are also modified into leglike appendages.
Because the mudskipper is a fish, it needs water for breathing even when on land. It carries water for this purpose in two pulpy reservoirs above the gills. The mudskipper's large round eyes are on the end of short stalks, which may be retracted into the eye sockets. The eyes move independently and can see in all directions, as well under water as above.