The super invasive rusty crayfish, sometimes called a gladiator, has been slowly taking over several waterways in Pennsylvania. The crayfish were transported to Pennsylvania from their native range in ...

URBANA, Ill. – Just how hard should natural resource managers fight invasive species after they establish? A new University of Illinois study suggests some invaders – even highly successful ones – can ...

Researcher George Merovich holds a captured specimen of the nonnative rusty crayfish near the Juniata River in central Pennsylvania. Photo by Stephanie Coster. Crawdad, crawfish, crayfish. No matter ...

Populations of rusty crayfish, an invasive species in the lakes of Minnesota and Wisconsin, have seen a steady decline in some regions—and, for once, humans aren't responsible. A study published in ...

Most mornings when Eric Larson hauls a wire-mesh trap into his fishing boat on northern Wisconsin’s Trout Lake, he finds dozens of coffee-colored crayfish wielding their oversized pinchers in a frenzy ...

Introduced crayfish are wiping out native species in North America, which has three-quarters of the crayfish species worldwide. New research provides the first evidence that introduced crayfish are ...

These crayfish are larger, more aggressive, and reproduce more quickly than native species, leading them to dominate ecosystems and disrupt food webs. Rusty crayfish have a significant impact on ...