Rusty crayfish, an ‘aquatic nuisance,’ discovered in northern Colorado river
- Posted on May 5, 2025
- By The Denver Post
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Rusty crayfish, an ‘aquatic nuisance,’ discovered in northern Colorado river

Rusty crayfish, an aquatic nuisance and an invasive species, has been discovered in a Larimer County river south of Estes Park, according to Colorado Parks and Wildlife.