Especially when it rains, the Berliners see them occasionally wandering on the streets and through parks: the swamp crayfish. The start-up HOLYCRAB! has caught the plagues and put them in the cooking pot. The result is delicious. Juliane Bublitz and Lukas Bosch, partners and co-founders of HOLYCRAB!, talk with European Business about the sustainable use of these unpleasant fellows, a potential extension to other plagues and how the idea for the start-up came about.