MPs are questioning the involvement of American crayfish in a dyke failure, which led to grassland flooding. Farmers blame the species for weakening dikes, but the Rijnland Water Board disagrees. VVD politicians are seeking information on the water board's stance on the issue and their actions to prevent the expansion of invasive species. They also seek details on the preventive measures in place for early detection and combating of invasive species, including American crayfish, in dike bodies.