Koi Fish

Koi fish are a type of domesticated fish that are popular in aquariums and ponds. They are known for their bright colors and patterns, which can include shades of red, orange, yellow, white, and black. Koi are a hardy species and can tolerate a wide range of temperatures, making them well-suited to life in various climates. They are also known for their long lifespan and can live for several decades with proper care. In this world, koi may be found in both natural bodies of water and in artificial ponds and aquariums, where they are often kept as pets.