About 75% of the earth is sea
70%.
30%
the sea is technically floating on the earth, as at the bottom of the sea there are techtonic plates.. Our oceans are just gigantic canyons that are filled to the brim with water.
Ask the sea in the middle of the earth
The Sea of Tranquility does not exist on Earth- it is a terrain feature on the Moon.
The interface of the sea and the earth is "the sea bed" the point at which the seabed stops being covered by the sea is called "the shore".
The Dead Sea does exist on earth. It is also called the Salt Sea, and it is between Jordan and Israel. The land around it is Earth's lowest elevation on land.
The Sea of Tranquility doesn't have any water, and is on the Moon and not the Earth, so that could be what you are looking for.
Mediterranean Sea
(10kg)x(9.80665N/kg)=98.0665N at sea level on earth
Mediterranean Sea