At the ocean’s deepest point, the water pressure is the equivalent of having 50 jumbo jets piled on top of you.
Underwater pressure is called hydrostatic pressure. (Hydro means water. Static means at rest.) The more water you have above you, the more it pushes against you.
For every 10 meters of water, hydrostatic pressure increases by one atmosphere. At the average ocean depth (3,800 meters), pressure on the sea floor is a whopping 380 times greater than it is at the surface. In the deepest trenches, it’s 1,100 times greater!