Mudskippers are members of the subfamily Oxudercinae (tribe Periophthalmini), within the family Gobiidae (gobies). They are completely amphibious fish that can use their pectoral fins to walk on land. Being amphibious,.
Mudskipper Mudskippers have developed small sacks around their gills that let them hold a breath of water, much the same way we would hold a breath of air. They climb trees so they can stay out of the water during high tide.