National Marine Park of Zakynthos, Marine protected area in Laganas Bay, Greece.

The National Marine Park of Zakynthos covers 135 square kilometres of Laganas Bay on the island's southern shore, including six nesting beaches — Gerakas, Daphni, Sekania, Kalamaki, E. Laganas and the islet of Marathonissi — about 5 km of sand in all. It also takes in the Keri Lake wetland and the Strofadia islets, 50 km south. Three marine zones (A, B, C) sit alongside strictly protected nesting areas, with fishing banned in all of them.

The park was established in 1999, largely in response to growing tourism pressure that was threatening the nesting grounds of sea turtles on the island's southern beaches. It was the first protected marine area of its kind created for this species in Greece.

The beaches around Laganas Bay are treated by many locals as home ground for sea turtles, not just a shoreline. Walking along the coast, visitors notice the marked zones and signs that show how closely daily life here is tied to protecting the animals.

The beaches of Laganas Bay are open year-round, but some sections have restrictions during summer months when turtles are nesting. It helps to read the signs at the shore and move slowly near any marked areas.

Laganas Bay is considered one of the most important nesting grounds for the loggerhead sea turtle in the whole Mediterranean. The turtles return to the same beaches each season, often to the exact spot where they themselves hatched.