Linked from
The 5 pages that link to Bellingshausen Sea, each with the reason it gives.
Antarctic PeninsulaRelated: It borders the peninsula’s western side.
Antarctic CircleRelated: The circle passes through waters near this sea and the peninsula.
Alexander IslandNarrower topic: The sea borders Alexander Island’s western side.
Adelaide IslandNarrower topic: Its waters surround the peninsula’s western island groups.