They knew he was big. For years, staff and visitors at Discovery Green have seen a large fish swimming in the park's 1-acre lake. Koi (Cyprinus carpio) and goldfish (Carassius auratus) are both in the ...

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 ...

Ohio Koi, a fish farm in Sunbury, is the largest importer of Japanese koi in the state. The company is opening a new 13,000-square-foot retail greenhouse called Mega-1 in March. Koi prices can range ...