What causes the ocean to have two distinct bodies of water that cannot be mixed

It’s worth noting that not all rivers produce this effect, as it depends on a number of factors such as the amount and type of sediments in the freshwater, and the salinity and temperature of the seawater. However, when these conditions are just right, the result can be a ѕtᴜппіпɡ natural display that is both beautiful and scientifically intriguing.