The Ancestor's Pool.
The ancestor's ground of the Great White Kingdom was located at the very center of the seamount where the kingdom was erected.
Kilometers around this center were vacant as the sharks did not build any settlements close to this place. At the center was just the magnificently built massive dome-shaped building that was called the ancestor's grounds.
Before they were allowed entry inside the sturdy dome-shaped building, the patriarch had to do an identity test to verify that he was who he called himself. This just went to show how much effort was invested in the security of this ground.
After the security checks and after the patriarch's identity was verified by the A.I, he and his son were finally allowed entry.
There were no decorations inside the ancestor's ground. Inside the dome-shaped building was just a vacant world with no furniture, no special embellishments, nothing but just vacant space.