|Native name: Πεταλίδα|
The islet of Petalida in the distance.
Petalida (Greek: Πεταλίδα, "limpet"), also known as Xera (pronounced Ksera), is an islet close to the northern coast of Crete in the Aegean Sea. It is located between the island of Imeri Gramvousa and the mainland. Administratively, it is located within the municipality of Kissamos, in Chania regional unit.