Dead Sea is located at the border of three countries namely Jordan, Israel and the west bank. The water level of Dead Sea is 430 mts below normal sea level of Earth and is highly saline which makes it denser than water that is 1.3 kg/lt. Due to this high density its water is highly bouyant because of which people float easily over it.
Because of this high salinity no living organisim can survive in it.Nor aquatic nor amphibious.
So it is called Dead Sea a sea in which no living organisim inhabits.