The North Mendlanar Sea was the northernmost body of water on the planet Romulus.
History and specifics[]
It was located north of Folloss, Novok and Valcaria, and encircled the north polar ice cap. The Uulmar Islands were located the North Mendlanar Sea. (Last Unicorn RPG - The Way of D'era: The Romulan Star Empire module: The Romulans)