Atlas Crab

The Atlas Crab is a four-legged creature with two claw-like arms. They are completely blind, and primarily detect predators and prey through vibrations in the ground. They are quite vulnerable, lacking an exoskeleton, hide or scales, and so for protection they burrow through the ground, occasionally hollowing out rocks from below to inhabit as a manufactured shell until they outgrow it, and must migrate to a larger rock.

Theoretically they can reach any size, and legends tell of an atlas crab that grew to the size of a mountain – though when they grow to inhabit a boulder much larger than a cart, they are usually hunted down to prevent them presenting too much of a problem.