Poliwag undergoes a dramatic change when it evolves to Poliwhirl. The most notable difference is that it has become bigger and gained arms with gloved hands while losing its tail. The eyes have moved to the top of its head and it apparently loses its visible mouth. Its nostrils are now visible. The direction of the swirl on its abdomen, created by its internal organs showing through the skin, reverses from the clockwise pattern of its pre-evolution, to counterclockwise. The skin on most of Poliwhirl's body is moist, due to an oily fluid; however, the skin on its belly spiral feels smooth.