Why Pacific and Atlantic oceans don't get mix?

There is a common misconception that pacific and atlantic oceans don’t get mixed up as shown on viral social media.

Videos show salt content affects density and "immiscibility," but salinity doesn't prevent mixing like oil & vinegar merging despite first division.

Viral videos often portray distinct water margins, with brief colour and sediment errors, although ocean currents blend these waters over time.

They were just visual illusions caused by freshwater rivers interacting with ocean water or sediment plumes combining with deep ocean water.

The oceanic currents, winds, and tides just facilitate daily water exchange between the Atlantic and Pacific, facilitating the movement of marine life