Koi fish

June 2018

Koi fish are one of the most recognizable fish in the world and can be kept both in indoor or in outdoor ponds.

Koi fish have been selectively bred for centuries to produce the many beautiful colour and pattern variations.
While often associated with Japan, Koi actually originated from Central Asia in China. It was the art of breeding Koi that has been mastered by Japanese and they are now the national fish of Japan.

Those that have the perfect body conformation, striking colouration and skin quality tend to be extremely expensive, being very sought after by hobbyists who want to compete in koi shows. A pattern that mimics the Japanese flag is a very desirable and expensive design. The most expensive Koi ever sold would be worth over £2million in today’s value.

Koi are associated with positive imagery, often described as symbols of strength and perseverance. They are also symbolized according to their coloration. While gold koi represent prosperity and wellbeing in business, blue koi symbolise tranquillity and the red ones signify strength and power. Owners who received their Koi fish as a gift are believed to bring good luck.

They can live longer than 100 years, although their typical life span is 25 to 35 years. Koi can grow very large, up to 1m long.
We would recommend a maximum of one koi per 1,000 litre of water.

Good filtration plays an important role in keeping Koi. These large fish produce a significant amount of ammonia in the water which can cause poisoning. They prefer warm temperatures between 15 to 25 degrees Celsius and are sensitive to drastic temperature changes. In natural habitat, Koi hibernate during the winter until the weather conditions improve.

They are very sensitive to the sun and can get sunburned if the pond they inhabit doesn’t have enough shadow. If the pond is in direct sunlight, it is recommended growing floating plants like water lilies. This should occupy approximately half of the pond’s surface to provide the fish with a comfortable place where they can escape the sunlight as well as hide from predators. Aquatic plants are also important in creating a more natural environment for the koi.

Waterfalls and fountains are two very popular design options for a pond. While visually pleasing they also helps to aerate the pond.

Koi fish are very intelligent and can recognise the person which feeds them. Also, they can be trained to eat from ones hand.

If you are interested in finding more information about koi fish or if you would like to discuss a project please contact our team here