Basculin is a green aquatic Pokémon that comes in three forms. The bodies of both the Red- and Blue-Striped Forms are the same. They have a green, ovoid body, tapering off in the rear to a trapezoidal tail fin. A thick black stripe covers the top of their body from mouth to tail and a white, dorsal fin with four protrusions resembling spikes. Their lower jaw juts ahead of their upper jaw, with a small indent near the edges of their mouth. Both forms have three black dots on both sides of their body, behind their pectoral fins. The main difference between the three forms of Basculin is the color of the stripe that separates the black and green on their body. All forms of Basculin have fins in the same places, with one on top of their body ahead of the tail fin, one below the body ahead of the tail fin, and two side fins. The Red-Striped Form has jagged fins that resemble tridents, whereas the Blue-Striped Form has smooth fins all around. The Red-Striped Form have circular, red eyes, while the Blue-Striped Form have narrower, blue eyes. (Source: Bulbagarden.net, CC BY-NC-SA)