Staryu is a Water-type Pokémon introduced in Generation I. It resembles a starfish and has a yellow, star-shaped body with a central gem that can change color. Staryu is known for its ability to regenerate its limbs, making it a resilient creature in battles. In the Pokémon games, Staryu evolves into Starmie when exposed to a Water Stone. It is often found in oceans and lakes, where it uses its arms to swim. Staryu is known for its high speed and special attack, making it a popular choice among trainers in competitive play.