In a forest, a man accidentally witnessed a remarkable sight: a huge army of terrestrial isopods moving across the ground like an organized swarm of insects. These tiny crustaceans, often mistaken for beetles, emerge to the surface after rain, when the air is saturated with moisture. Unlike their marine relatives, the giant isopods, which live on the ocean floor, terrestrial isopods form entire "infantry" columns and migrate in search of a suitable environment. This phenomenon is extremely rare and truly mesmerizing!