1. Marine organisms would die as they are capable of surviving only in sea water (salt water).
2. Coral formation could not take place as they are made up of calcareous minerals.
3. Salt is quite important in daily usage.
4. We would have to rely on artificial production without natural salt, which would incur a lot of monetary and infrastructural expenses.
5. Salt water can hold heat better.
6. Sea life is adapted to salt water.
7. Ocean currents would be completely disrupted.