"The Sea Dwellers" was the name of the people and their families living in this area at the same time they are called "Sea-Man" or "Sea-Dwellers" by other people and themselves.
Because each person born in the area was capable of breathing underwater and moving more quickly underwater and at the same time when they fight in the underwater they are three to four times stronger than when they were on the land.
It was like an Advanced Level Mystic "Sea-Man" could kill a normal "King Level Mystic" underwater
"The Sea Dwellers" was the coastline of the eastern region and the entire coastline of the western region. Because of their natural-born abilities, they naturally stood close to the "rivers" "oceans" and similar puddles."
Unlike other formations and countries, they were watching and practicing an "oligarchy" order.