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Depends on the depth.
Water pressure.
The pressure (force per cm2) at a particular depth is the weight of water above that square centimetre.
It depends where in the ocean you mean! To work this out: At sea level, the Earth's atmosphere exerts a pressure of 1 bar. Then each 10 meter depth of Sea Water also exerts a pressure of 1 bar. So take your ocean bottom depth (in meters) divide it by 10 and add 1. This will give you the pressure at that depth of ocean. alot
Both temperature and pressure increase with depth.
A rapid change in temperature with depth in the ocean is called thermocline. A rapid change in density with depth in the ocean is called the pynocline.Thermocline
Pycnocline
At a greater depth, the weight of all the liquid (or gas) above adds to the pressure.
The primary change is of pressure, increasing at 1 Bar per 10 metres of depth; but in the oceans, the temperature and salinity also alter in subtle ways.
the cat in the fiddle
pycnocline
It is the weight of the water pressing down from above. The greater the depth the greater the pressure.