A large koi fish was spotted and removed from the McKenzie River near Eugene after a report to the Oregon Invasive Species ...

Fish and Wildlife officials say a live koi fish was illegally dumped into the McKenzie River. Koi fish are invasive and can ...

Mature koi can produce 5,000 to 10,000 eggs and the largest koi can lay 500,000 eggs. “Introduced, non-native fish can spread deadly diseases to wild fish populations,” said Jeff Ziller, ODFW ...