What are the saltiest seas and their amount of salt?

Here are some of the saltiest seas in the world and their approximate amount of salt:

1. Red Sea: 40 parts per thousand (PPT)

2. Persian Gulf: 40 PPT

3. Mediterranean Sea: 38 PPT

4. Adriatic Sea: 38 PPT

5. Dead Sea: 350 PPT

These seas have a higher concentration of dissolved salts compared to the average salinity of the world's oceans, which is around 35 PPT. The high salinity levels are influenced by factors such as limited freshwater inflow, intense evaporation, and restricted circulation.