What is a Terrestrial crustacean that roll into a ball?

A terrestrial crustacean that rolls into a ball is known as the pill bug, or Armadillidiidae family. Commonly referred to as "roly-polies," these small, woodlice-like creatures can curl up to protect themselves from predators and desiccation. They are often found in moist environments, such as under rocks or decaying leaves, where they feed on decomposing organic matter. Unlike true insects, pill bugs are more closely related to shrimp and crabs.