Elafonisi (Greek: Ελαφονήσι [elafoˈnisi] “deer island”) is an island located close to the southwestern corner of the Mediterranean island of Crete, of which it is administratively a part, in the regional unit of Chania. When the weather is fine it is possible to walk to the island through the shallow water. The island is a protected nature reserve. It is known for its pink sand beaches, created by tidal and wave-induced deposits of pigmented microorganisms living in a symbiotic relationship with native seaweed.