Staryu is a Water type Pokemon introduced in Generation I. It evolves into Starmie when exposed to a Water Stone. Take a look below for 27 fascinating and interesting facts about Staryu.

1. Staryu is a golden-brown starfish like Pokemon with five appendages.

2. These appendages surround an exterior organ called the core.

3. The core resembles a golden metal casing with a red gem in the center, which is held in place by a golden ring looped around Staryu’s lower left point.

4. If any of Staryu’s appendages are lost or eaten by predators like Lumineon, it is unharmed and can grow them back with ease provided the core is still intact.

5. When the sun goes down, the core glows its brightest.

6. Many Staryu will float from the seafloor to the surface and align themselves with stars of the night sky as their core flickers, displaying a connection with the celestial bodies of space.

7. The anime has shown that if Staryu becomes weak, its core will grow faint and flash slowly. 

8. Staryu can be found at the very bottom of the ocean on the seafloors.

9. There are times, however, when Staryu finds itself in rivers that lead into the ocean as seen in Pokémon Snap.

10. In the past, Camouflage was its signature move.

11. In Pokémon Ranger, Staryu is the only Pokémon with the Field Move Flash.

12. Once Staryu serves its purpose with Flash, it cannot be captured again, except during the Kyogre mission.

13. Staryu is one of fourteen Pokémon that one is able to collect foreign Pokédex entries for in Pokémon Diamond and Pearl.

14. Staryu shares its category name with Cleffa. They are both known as the Star Shape Pokémon.

15. Despite being a genderless Pokémon, Staryu and Starmie were programmed to learn Egg moves in Gold and Silver; however, due to being genderless, these were unobtainable. This was fixed in Crystal.

16. Also, they are one of the few genderless Pokémon able to learn Attract in Generation II, along with Mew.

17. Staryu may be considered a counterpart of Shellder. Both are Water-types in the Water 3 Egg Group, both evolve with a Water Stone, and both gain a second type upon evolution. Cloyster is seen as a slow defensive Pokémon, while Starmie is seen as a fast attacking Pokémon.

18. They also have a chance of holding valuable items, Stardust/Star Piece and Pearl/Big Pearl, respectively. Staryu is exclusive to LeafGreen and X, while Shellder is exclusive to FireRed and Y, with both Pokémon found by fishing in the same locations in their respective versions.

19. PokéPark 2: Wonders Beyond erroneously refers to Staryu as a male, despite it being a genderless Pokémon.

20. Staryu’s design is based on a starfish, likely a common starfish.

21. Conceptually, it appears to be a pun on a literal star, as Staryu is rumored to be extraterrestrial in nature.

22. The large gemstone attached to its body is held on by a bracket, similar to a ring mount. Additionally, although Staryu’s gem seemingly does not display it, the concept of asterism is worth mentioning in terms of Staryu’s possible design basis, especially since Staryu’s is a cabochon gem. If this was indeed inspiration for its design, then Staryu’s gem is perhaps a star-ruby.

23. Staryu is derived from star (referring to its shape) and yu (possible corruption of you, in opposition to the mie in Starmie). Yu is also the Chinese word for fish.

24. Staryu is one of Misty’s main battlers throughout the original series, debuting in Clefairy and the Moon Stone. It also appeared during Misty’s cameo arcs in the Advanced Generation and Sun & Moon series.

25. Two Staryu appeared in The Great Eight Fate!, under the ownership of Juan. They were some of his Pokémon used in the Sootopolis City Water Exhibit. They and Juan’s other Pokémon were captured by Team Rocket, but they all worked together to escape.

26. Two Staryu appeared in the Hoopa’s Surprise Ring Adventures short Shooting Star. One crashed down on Ash and Pikachu and sent them flying, while the other blasted Hoopa off.

27. A Staryu appeared in The Power of Us, under the ownership of Toren. It was lent to Callahan for the Pokémon Catch Race.