Top Signal Crayfish Fishing Countries

The signal crayfish (Pacifastacus leniusculus) is a large, aggressive freshwater crustacean native to North America, particularly the western United States. Recognizable by its robust claws and a distinctive pale patch near the claw hinge, the signal crayfish has been widely introduced to Europe and parts of Asia for aquaculture and as a replacement for native crayfish decimated by disease. Today, the top countries harvesting signal crayfish include the United States, Sweden, Finland, and the United Kingdom. In the U.S., wild and farmed signal crayfish support regional fisheries, while in Europe, especially in Sweden and Finland, they are prized for traditional crayfish parties and form a significant part of the seasonal freshwater fishery. The UK also has a growing industry, mainly focused on controlling invasive populations and supplying local and export markets. The fishing industry for signal crayfish is both commercial and recreational, with management efforts in Europe aimed at balancing economic benefits with the need to protect native species and ecosystems.

Data from FAO. 2025. Global Capture Production. In: Fisheries and Aquaculture.