The fish's body consists of a giant, rusty metal frame held together by countless gears, screws, and rivets. Instead of scales, its body is covered with tiny, shiny metal plates that interlock to form a complex, moving surface. The line on the fish's side is a long, shiny metal tube that runs along its body, likely driving some kind of mechanical process. The fish's head is a huge, copper-colored sphere filled with gears of various sizes and shapes. The eyes are large, round lenses protected by metal frames. The mouth is a huge, serrated opening in which several smaller gears can be seen. The fins are made up of large, metal plates connected by numerous joints. There are also gears on the edges and inside of the fins, which allow the fins to move precisely. The tail is a large, paddle-shaped metal plate held together by joints made up of several smaller plates. In the center of the tail is a large, circular gear that controls the movement of the tail. The basic color of the fish is rust, which is given by the patina of the metal parts. However, the fish can also be found in a variety of other colors: copper, gold, silver and black. These colors are due to the different metal parts and worn surfaces.