In 2006, Grand Canyon began a major trout-reduction effort in Bright Angel Creek; after invasive brown and rainbow trout were suppressed, the National Park Service says native fish populations increased by more than 400%
At least five of the Grand Canyon’s eight species of native fish were historically found in Bright Angel Creek. However, these species that are uniquely adapted to the characteristics of the Colorado River and its tributaries have suffered serious declines over the years due to human-caused changes to their habitat. The creek once supported a…