These fish can live to be anywhere from 20 to over 200 years old. The average life span is between 20-50 years old. If you are considering keeping koi fish you sure need some real commitment! The longest-lived koi fish is a female named Hanako. She lived to be approximately 226 years old!
People also ask
How long do Koi live in captivity?
How long do koi live in captivity? The average lifespan of Koi fish in captivity is 25-35 years. Whereas in the wild, they are known to be living for 15 to 20 years, and male Koi live longer than females. Japanese Koi tend to live longer due their superior genetics.
What is the oldest koi fish ever?
The oldest Koi fish ever, to date goes by the name of Hanako. Hanako was a female Koi fish that was scarlet-colored. The interesting part is, on average, the lifespan of Scarlet Koi is around 40 years. However, Hanako weighed 7.5 kg and aged 226 years old in the 1970s.
How big do koi fish get?
On average, a koi fish will grow between 24-36 inches in length. The typical western domestic koi fish will have a size between 12-15 inches when reaching maturity, while Japanese koi grow up to be 22-26 inches long. Jumbo varieties of koi will grow to be as long as 34-36 inches.
Can koi fish live in a garden pond?
The Koi fish thrive in garden ponds with a pH level between 7.0 and 8.6. Therefore, you should remove all decaying vegetation and leftover Koi food to maintain the pond pH levels. To help with this, water filtration systems come in handy.