Devil Fruits in One Piece tend to filter into one of three categories. There are Zoan fruits, which transform the user into animals, or in rare cases, mythical beings. There are Logia fruits, which allow the user to control a designated element. Finally, there are Paramecia fruits, which allow the user to do pretty much anything else. A user can gain one of these powers by eating a Devil Fruit, in exchange for losing their ability to swim.