The crayfish were transported to Pennsylvania from their native range in the midwest more than 50 years ago when they were used as fishing bait. “When folks were done fishing with their bait ...

The UK native white-clawed crayfish (Austropotamobius pallipus) crayfish is under considerable pressure throughout the UK from the invasive American signal crayfish ... who’s members are drawn from a ...

No species should be outside its natural range in the wild," he said ... Great Crayfish Plague' because it wiped out crayfish in Europe [after American species were introduced] back in the ...