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Exotic crayfish

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Insufficient water quality

The quality of the water is insufficient.

Exotic crayfish have negative effects on native plants and animals, and thus on the (ecological) water quality. In addition, they dug holes in banks, which could lead to damage to flood defenses and increased dredge. Regular trapping methods (cages and traps) catch only adult, and mainly male, specimens.


Pan flute trap

The pan flute trap is a crayfish trap consisting of a plate with a number of tube pieces of different diameter. One side of the tubes is closed and on the other side, a rope is attatched to remove the construction out of the water. The crayfish take shelter in the trap, allowing crayfish at all stages of life to be captured.


  • Catches both males and females.
  • High yield.
  • No bycatch.


  1. Topic Water safety
  2. Development state 6: System/subsystem model or prototype demonstration in a relevant environment
  3. Setting type Rural area, Agricultural area, Natural area, Lake area, Urban area
  4. Water type Surface water