The life and health of their pets is the main concern of every anxious fish owner, who wishes to provide the best food, care and living conditions, all conducive to the optimum well being of their aquatic pets.
The lifespan of Koi, like any other fish species, depends largely on the environmental conditions of its habitat and the suitable amount of care and feeding it needs for a healthy life. Overeating, high toxicity pond water levels, inadequate water temperatures and risk of becoming prey to natural predators and parasites, are some of the reasons which might have an impact on the lifespan of a Koi.
The average lifespan of a Koi has been estimated to be around 25 to 35 years of age, with some easily living for about 40 years of age.
The oldest Koi fish which enjoyed a healthy life of around 226 years old was the famous "Hanako" scarlet Koi, which had a number of owners, and died in 1977. The actual age of the oldest Koi was estimated in around 1966, after an examination of its fins and scales.
The real life example of Hanako gives evidence to the age limit up to which Koi fish can last, if provided with all the essentials, vital for its survival. Hanako was kept in a stable habitat, with low geologic activity, and thus lasted for generations of owners.
The average lifespan of a Koi differs from that of the famous Hanako, due to the unavailability of various essential factors, which are necessary for the survival of the species.
Your Koi can last for a number of years, but only if you provide it with suitable care, observe required feeding patterns, keep it in a pond having the required temperature, and avoid overfeeding it. Besides becoming a prey to large fish, Koi fatality rate is mostly affected by the act of overeating, something which proves to be very dangerous for their survival.
As Koi grow throughout their life, it is indeed important to provide them with adequate space to ensure their proper growth. Any negligence can restrict the probable number of years your Koi can live healthily.