The water gets cooler
denser
It gets colder because the Sunlight heats the ocean and the deeper you go, the less penetrating the Sunlight is, therefore making the ocean water colder.
the water becomes saltier and denser and its common near the shore.
ocean water, because it is saltier.
Sea water is denser, not only that, different oceans have different densities.
it becomes less dense
The water of the oceans is denser because of the high level of salt it contains.
they sink
it becomes colder
it becomes a solid wich is smaller but denser.
By forcing currents to go over or under other currents depending on the density of the current
I think it sinks toward the ocean floor.