In West Africa, and the eastern Mediterranean, Ocypode cursor prefers to live in sandy beaches, where it burrows near the high-tide mark, and sometimes above the intertidal zone altogether. The water content of the sand was the key factor determining burrow distribution. It is less tolerant of extremes of salinity and temperature than the fiddler crab Uca tangeri, but can still extend some distance into brackish waters. O. cursor is a predator, and frequently feeds on the eggs of sea turtles. In the Mediterranean Sea, where the tidal range is negligible, the burrows of O. cursor begin within 3 metres (10 ft) of the sea, with larger crabs further from the water's edge.