Costes del Garraf, Protected coastal area in Garraf, Spain

Costes del Garraf is a marine protected area off the Garraf coast, extending from Castelldefels to Cunit down to the 20-metre bathymetric line. Its seabed is mostly sandy with rocky limestone outcrops and damaged Posidonia oceanica seagrass meadows. The adjoining cliffs are steep and heavily karstified.

The marine area between Castelldefels and Cunit was declared a site of community importance and a Special Protection Area for Birds (ZEPA) in September 2006, which automatically integrated it into the PEIN. The designation was driven by seabird populations such as the Balearic shearwater, Cory's shearwater, Audouin's gull and Mediterranean gull, and by the Posidonia oceanica meadows on the seabed.

The coastal area connects with the Penedès wine region, where vineyards have long produced wine and sparkling wine using traditional Mediterranean methods.

The protected marine strip runs from Castelldefels to Cunit down to the 20-metre depth line, so it is reached by boat or from the beaches and cliffs above. Anchoring and recreational fishing take place in the area. The seabed is mostly sandy with rocky limestone outcrops, and the Posidonia meadows are damaged, so divers should avoid touching the bottom.

The marine area was declared a Site of Community Importance and a Special Protection Area for Birds in September 2006, partly for species such as the Balearic shearwater, Cory's shearwater, Audouin's gull and the Mediterranean gull. It is also a protection zone for the bottlenose dolphin, and the common fin whale, the only whale in the Mediterranean, is studied there in spring.