in the sea
The higher the salinity of the water the easier it is to float - the Dead Sea, the Caspian Sea, the Great Salt Lake.
The density of salt water is higher than fresh water.
Due to high density of sea water things float higher in sea water.
If you compare the density of sea water, and then compared the extremely salty Dead Sea, you will find that the more salt in the water, the higher is the density. Which is why you can float on the Dead Sea while reading a newspaper (which I once saw demonstrated in a documentary). Also, a ship will float lower on a fresh water lake, and float higher on salt water.
sea water has a higher density
The Great Salt Lake. The Great Salt Lake has such a high salt concentration that it is easy to float. In fact, the old slogan of the Saltair Resort (a tourist spot at the Great Salt Lake) was "Try to Sink!!"
Salt water is more dense than fresh water. A ship would float higher at sea, and lower on a fresh water inland lake.
because our height is less than the quantity /volume of water in the sea /river /lake
they have excessive amount of salt causing you to float on the water
The Atlantic and Pacific are oceans, not "seas". The salinity is about the same, so there isn't much difference in being able to float. The Dead Sea has a very high salinity, and it's very easy for people to float there. Same with the Great Salt Lake.
Because the the sea water contains salt, which increases the density of the water. Therefore, the ships becomes even less dense than the water, making it float higher.
Sea water has salt, and therefore a higher density.