- Koi fish are a type of domesticated carp that were selectively bred for their bright colors and patterns. They originated in Japan, where they were originally kept as food fish, but eventually became popular as ornamental fish.
- Koi fish are known for their long lifespans. In ideal conditions, they can live for up to 30 years or more! The oldest koi fish on record lived to be 226 years old, but this is extremely rare.
- Koi fish are omnivores and will eat just about anything, including insects, plants, and small animals. They have even been known to eat human food, such as bread and cereal, but these foods are not healthy for them and should be avoided.
- Koi fish are highly valued in Japanese culture and are often seen as symbols of good luck, prosperity, and perseverance. They are often featured in art and literature, and there are even koi-themed festivals held throughout Japan.
- Koi fish are social creatures and enjoy swimming in groups. They are also known for their playful and curious personalities, and will often interact with their owners and other fish in their pond or tank.