Atlantia

The royal nation of Atlantia, a nation of mer (merpeople) ruled by the Atlandotir Dynasty for over 1,000 years, it spans almost the entirety of the Atlantic Ocean.

1600s-1800s
Atlantia controls most of the trade between Europa and other continents across the Atlantic. Their supreme mercantile position makes the Atlandotir Dynasty incredibly wealth (see phrase, "A mer-king's ransom").