Crayfish Plague Confirmed in River in Co Cavan By now you will probably be aware that the presence of the deadly crayfish plague (caused by the fungus-like organism Aphanomyces astaci) has been confirmed in the River Erne system. The outbreak was detected when up to 600 dead native white-clawed crayfish (Austropotamobius pallipes) were found in … Continue reading Invasive Crayfish Plague Alert