Life at Desert's Edge: Ghost Crabs

Synopsis
The desert comes right up against the sea along the coast in the Middle Eastern country of Oman. Small mounds in the sand about 30 centimeters high can be seen for 25 kilometers all down the coastline. These mounds are made by male ghost crabs to attract females. The males are engaged in a tough competition to make the highest mating chamber in the sand. Who will be the winner in love this summer on the beach?