Sand bubbler crab

The squat, compact Sand Bubbler Crab resembles its relatives, the Ghost Crabs, though it is much smaller in size. Adults measure about 12 mm across the carapace. Unlike Ghost Crabs, the claws of the Sand Bubbler Crab are equal in size, although larger in males than in females. A flattened membrane, called the tympanic membrane, occurs on the inner surface of the thigh on each leg. This species is grey-brown in colour, and usually well-matched to the colour of the sand where it lives.