Add Yahoo as a preferred source to see more of our stories on Google. The super invasive rusty crayfish, sometimes called a gladiator, has been slowly taking over several waterways in Pennsylvania.

Researchers trap rusty crayfish to test ways to remove the invasive species. Researchers trap rusty crayfish at Tofte Lake to develop methods for removing the invasive species from northern waters ...

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 ...