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 supplies for ...

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 ...

Swedes are obsessed with crayfish. In August, when the annual fishing season starts, families up and down the nation hold parties to celebrate. But what's so special about the tasty crustaceans? Feast ...

Global heating is destroying creeks the crayfish call home. They’re the canary in the coalmine for other species living in the delicate ecosystems Follow our Australia news live blog for latest ...