That wasn’t supposed to be there. An angler in Utah reeled in a fish much larger than he was expecting while on a trip to Highland Glenn Pond. Not only was the size of the fish a surprise, but also ...

Is a goldfish the "Loch Ness" of a small South Carolina lake? Or is a small koi on the loose? The identity of this fish remains a mystery. Parks and recreation workers in South Carolina found what ...

PORTLAND, Ore. (KOIN) — A large koi fish was spotted and removed from the McKenzie River near Eugene after a report to the Oregon Invasive Species Hotline on Wednesday. The Oregon Department of Fish ...

A koi by any other name smells the same — like a carp. Even so, a monster koi with a whitish-pink body, long, frilly fins and protruding "eyebrows" was among the hundreds of fish saved this week by ...

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 ...