Koi aren't lightweights either; they typically tip the scales around 35 pounds (16 kg), and experts advise filling a pond ...

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 ...

District fish biologists removed the large koi which was most likely intentionally released into the McKenzie River. Koi can live up to 25 years, reproduce rapidly, and can survive very cold winters.

For example, there are koi with light blue spots, ones with large red patches on their backs, or all-metallic gold. But the most winning fish often just boil down to these three varieties.