How do trilobites protect themselves?

Trilobites protected themselves primarily through their hard exoskeleton, which provided physical defense against predators. Many species could also roll into a ball, similar to modern pill bugs, offering additional protection by presenting a more formidable surface. Additionally, some trilobites had spines or other protrusions on their bodies, which may have deterred potential threats. These adaptations helped them survive in various marine environments throughout their existence.