This fish sold for $1.8 million — here's why some koi fish are so expensive Koi fish are colorful patterned common carp that are now celebrated in annual koi shows and kept in ponds all over the world ...

Nishikigoi, better known as koi fish, are a well-known variety of the common carp. They are bright red and white and revered for their vibrance and grace. Even other animals, including their predators ...

Once a simple food fish, koi have transformed into living jewels, with some fetching sky-high prices in the global luxury market. Here's how this happened. In the world of high-end pets, few creatures ...

Sourcing and selling koi carp — some of the most expensive pet fish in the world — can be both a profitable business and an enjoyable pursuit. This is especially true for Tim Waddington, the owner of ...