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Grand Canyon trout removal helps native fish populations rise over 400%
Historically, Bright Angel Creek was a sanctuary for various native fish species, including the endangered humpback chub. However, the rise of non-native brown trout has threatened this ecosystem. In an effort to restore balance, the Bright Angel Creek Trout Reduction Project was initiated, successfully eliminating invasive trout and leading to a remarkable 400% increase in native fish population…
The Times of IndiaIn 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%
TOI Science Desk · Oct 13, 2026