For decades, the signal crayfish has been an ecological troublemaker. It is invasive and widespread across Europe, Asia, and parts of the United States. Recently, researchers at the University of ...

"It is important to note that this is a unique species that arose in aquarium culture via a mutation and is not native in the wild anywhere," said Monica McGarrity, a senior scientist for aquatic ...

In a study of crayfish in the Current River in southeastern Missouri, researchers discovered -- almost by chance -- that the virile crayfish, Faxonius virilis, was interbreeding with a native crayfish ...