In the seas of which ocean of the Earth is the water salinity the lowest?

It will not be possible to give an exact answer to this question, and here’s why. In order to calculate the salinity of water, you need to collect all the water that is in the ocean and measure the salinity.

However, in theory, the Arctic Ocean is the saltiest. This answer is correct for two reasons. First, the waters of large rivers enter the ocean. Secondly, the ocean has the lowest water evaporation.