The island of Pelagos (Πέλαγος), sometimes referred to as Kyra-Panayia (Κυρα-Παναγιά), is an uninhabited island. It has two very good anchorages: Planitis in the north-east and Kyra-Panayia in the south-west. Planitis is a large landlocked bay, surrounded by green vegetation. On the east side of the island there is an old, now abandoned, monastery. It is also a sanctuary for marine mammals and birds, and fishing is prohibited.
The organization for the preservation of the Mediterranean Seal, Monachus Monachus or as it is locally known, MOmoperates out of Alonnisos. They operate an information pavilion in Patitiri, a seal rescue station in Gerakas, and a patrol boat that helps with the enforcement of the regulations of the marine sanctuary, also referred to as the Marine Park. The regulations prohibit any vessel to approach within 1 nM the islands of Piperi and Yura and allows anchorage only at Planitis and Kyra-Panayia in Pelagos and at Skantzoura.