Finneon is a small fish Pokémon with a football-shaped body. The bottom half of its body is light-blue while the top half is black. A purple stripe runs across Finneon's horizontal length. Finneon has small blue pectoral fins, two black oval-shaped dorsal fins and purple eyes. Finneon's most notable feature is the pair of caudal fins that resemble a pair of blue butterfly wings with purple spots. Because of its wing-like fins, it is known as "The Beautifly of the Sea".