The Caspian Sea has lower salinity than most seas primarily because it is an enclosed body of water with limited connection to the ocean, leading to high evaporation rates without significant salt input. Additionally, it receives considerable freshwater inflow from rivers, such as the Volga, which dilutes its salt concentration. These factors combined result in its unique brackish water, with salinity levels lower than typical oceanic salinity.
The higher the salinity of the water the easier it is to float - the Dead Sea, the Caspian Sea, the Great Salt Lake.
Caspian sea is in the eastern hemisphere of seas and oceans
Black and Caspian seas
Caucasus Mountains separate the Black Sea and the Caspian Sea.
Some inland seas include the Caspian Sea and the Great Lakes.
A palaeosalinity is the salinity of the seas in the geological past.
Azerbaijan
Caspian, Dead, Aral, Black seas.
Mediterranean, Black, Caspian, Arabian, and Red Seas
There are several factors that affect salinity. Some of the main factors include evaporation and precipitation which will affect the salinity of oceans and seas.
Red Sea and Persian Gulf are the areas with the highest salinity. Then the areas with lowest salinity would be the polar seas (or seas near to the polar tips), and sometimes some seas near a fresh body of water. For example, the South American area near Amazon River only has an average salinity of 28 o/oo. The Baltic Sea may have an average salinity of 5 o/oo. Hope this helps!!
The world's oceans have a salinity of about 3.5%