Jade Cove, south of Sand Dollar Beach, is also sometimes popular with visitors. In 2008, biologists discovered that sand dollar larvae clone themselves as a mechanism of self-defense. It is the only sand dollar found in Oregon and Washington. This sand dollar is present from western coast of Sahara and Senegal to Angola. In the south, Sand Dollar Beach is the longest stretch of beach in Big Sur. Keyhole sand dollar refers to three species of sand dollars in the genus "Mellita". Common names include sand dollar cactus, sea urchin cactus, star cactus and star peyote.