Ireland is regarded as the last stronghold of this species, but locals have found hundreds of dead crayfish in the river Maigue

South Ostrobothnia’s native crayfish stocks have collapsed over the past decade, driven by crayfish plague and the spread of the invasive signal crayfish, according to the South Ostrobothnia Fisheries Centre. The region’s traditional crayfishing grounds, including Lappajärvi, once supported comme…

A warning from long-time crayfish researcher Japo Jussila says the deadly rapurutto fungus can travel between lakes on almost any damp equipment, including swimsuits and wetsuits. Jussila, based at the University of Eastern Finland, told Yle that Aphanomyces astaci spores latch onto wet materials…