Well, it's worth 1.8 million dollars. It won grand champion at the All Japan Koi Show in 2017, and is the most expensive koi fish ever sold. Koi may just look like an oversized goldfish ...

In recent years, koi have become hugely popular in Asia, with Japan's koi exports doubling over the past decade to 6.3 billion yen ($43 million) — one-fifth of them shipped to China, the top ...

A koi that swims against the stream is able to bring good luck to a person who witnesses it. In Japan language, Koi is a homophone word - it sounds the same as the word denoting affection and love.