- This article is about the fish, were you looking for the pin?
- Not to be confused with Goldfish.
Koi are a species of fish (specifically carp) that live in various bodies of water in Club Penguin.
- Koi made their first appearance in the Koi Pond furniture item; periodically, they will jump out of the water and go back in.
- When Fairy Fables is playing at the Stage, a koi fish will jump out of the water every so often.
- At the Medieval Party 2009, many koi fish were swimming on a fountain at the Lodge Attic. You could also feed them.
- There is a Koi Fish Pin as well as a Blue Koi Fish Pin, which suggests numerous koi fish around Club Penguin.
- The smallest gong at the Ninja Hideout featured a koi fish.