Yes, crabs have the ability to regenerate lost limbs. When a crab loses a limb due to injury or predation, it can regenerate the limb over time through a process called autotomy. The process involves the crab intentionally shedding the limb at a predetermined breakage point to escape from a predator or a tight spot. Afterward, the crab's body initiates regeneration, growing a new limb to replace the lost one. The regenerated limb may not be identical to the original, but it can still function effectively.