Shellfish gathering in the Foz estuary Food and drink · Barreiros, Mariña Oriental, Lugo Image of Barreiros, not of the place itself. The eastern shore of the estuary, in the parish of Benquerencia, is an area for gathering clams and cockles on foot, shellfish that in the comarca are stewed with rice or simply opened by steaming. Photo: Đuro Jiří (CC BY-SA 4.0) What to see and do in Barreiros