Mudkip is a small, amphibious, quadruped Pokémon. It has a blue body with a light-blue underside. It has a large head with a blue fin on top and a light-blue tail fin. It has black, beady eyes and orange, star-shaped gills on its cheeks. By using the fin on its head, Mudkip is able to detect changes in air and water currents as well as bodies of water.