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.

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 ...

The rusty crayfish has been found in Maryland since 2007, Virginia since 2011, Pennsylvania since 1976, West Virginia since 1977 and New York since 1978. Both the Susquehanna and Potomac rivers have ...

URBANA, Ill. – In many North American lakes, a tiny clawed creature has become a big bully. The invasive rusty crayfish roams lakebeds, snapping up snails, bivalves, and water plants, cutting off food ...

An invasive species of crayfish that is taking over streams from Minnesota to Maine might be successful because it's not a fussy eater, according to biologists with the University of Cincinnati. In ...

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 die off naturally, ...

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 ...