Looking across the Abecean Sea from just south of Anvil
The Abecean Sea is a body of water to the west of Tamriel that sits between Cyrodiil, Hammerfell, Valenwood, and Summerset Isle. The sea is encompassed by the Eltheric Ocean.
In Oblivion, only the eastern part of the sea is present; it is the sea into which the Brena and Strid rivers flow and lies to the west of Anvil. Going north from Anvil, the Ayleid ruin Garlas Agea borders the sea with the vampire-filled fort Crowhaven nearby. Farther north lies the Ayleid ruin Beldaburo.
A mysterious shipwreck rests alongside a small island in an inlet of the Abecean Sea, up north near the mouth of the Brena River (map).
For more information about the Abecean Sea, see the lore article.