ALEXANDRIA, Minn. — Yet another aquatic invasive species has invaded a Minnesota lake — this time the signal crayfish, a native of the Pacific Northwest confirmed in Lake Winona. The Minnesota ...

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 ...

Researchers recently discovered two new crayfish species: the Okanagan crayfish and the misfortunate crayfish (Pacifastacus malheurensis). Because both species were previously thought to be signal ...