User blog comment:Glflegolas/Biome of the Week -- Issue 15 -- February 19, 2017/@comment-30079501-20170220175644/@comment-25012056-20170220180723

Well, the Sea of Rhûn is just the Ocean biome. Theoretically, that means Elven Ruins happen there too.

Gen. Grievous1138 (LOTR Mod Wiki Admin) comlink 18:07, February 20, 2017 (UTC)