Periophthalmus barbarus, commonly known as the mudskipper, is a species of amphibious fish found in the coastal regions of West Africa, including estuaries and mangrove swamps. These unique fish are noted for their ability to spend time both in and out of the water. Mudskippers have specialized pectoral fins that function like legs, allowing them to move across muddy surfaces and even climb on vegetation.

Adapted to an amphibious lifestyle, they can breathe air and absorb oxygen through their skin. Mudskippers are omnivorous, feeding on a diet that includes small invertebrates, algae, and detritus. Their behavior and physiology make them fascinating subjects for those interested in the diverse adaptations of aquatic life.