The coldest ocean is the Arctic Ocean.
It is by the artic.
It depends. If the river is in the mountains or near the Poles than it's probably colder but if the ocean is like the arctic ocean or something like that then that's probably colder
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.
Atlantic is colder becauseit is near the Arctic ocean more than the pacific is .
lack of sunlight
the deeper you go, the colder the ocean water gets
gets colder
The tropical ocean waters are more saline than colder waters because due to ocean circulation, as seawater moves in horizontal and vertical directions.
changing in heat in the ocean colder sinks warmer floats
because as it gets deeper it gets colder
because it is colder up there
mostly cold but the deeper the colder
it depends on what opart of the ocean you are talking about...the deeper you get the colder it becomes nad the closer you get to the south or north pole the colder it becomes