Cancer

Reactive cancer
Distributed in fresh water bodies throughout Europe. It can be found in fresh clean water: rivers, lakes, ponds, fast or flowing streams (3-5 m deep and with depressions up to 7-12 m). Hunting river crayfish at night. In the daytime it hides in shelters (under rocks, tree roots, burrows or any objects lying on the bottom), which protects from other cancers. Digs burrows, the length of which can reach 35 cm. In summer it lives in shallow water, in winter it moves to the depth, where the soil is strong, clayey or sandy.