Staryu is a golden-brown, echinoderm Pokémon featuring five appendages. These appendages encircle an external organ known as the core. The core looks like a golden metal casing with a central red gem held in place by a golden ring wrapped around Staryu's lower left point. If any of Staryu's appendages are lost or consumed by predators such as Lumineon, it remains unharmed and can regenerate them easily as long as the core is intact.
As the sun sets, Staryu's core glows at its brightest. Many Staryu float from the seafloor to the surface and align themselves with the stars in the night sky, their cores flickering to display a connection with celestial bodies. The anime has shown that if Staryu becomes weak, its core will dim and flash slowly. Towards the end of summer, groups of Staryu tend to gather, lighting up in a steady rhythm. Staryu can be found at the bottom of the ocean on the seafloors. However, there are instances where Staryu finds itself in rivers leading into the ocean, as seen in Pokémon Snap.
In the Pocket Monsters Encyclopedia and the original Japanese version of the anime episode "The Water Flowers of Cerulean City (EP007)," Staryu is classified as hermaphroditic.
Evolution
Staryu evolves into Starmie.
(Source: Bulbapedia)
