How do fish survive the intense pressure of deep water? 
By Zach Fitzner UK Source: earth 9/29/2022
Zach Fitzner
The deep ocean is a harsh environment. At 11 kilometers below, water at the Mariana Trench exerts eight tons of pressure per square inch. This is 1,100 times greater than the pressure at sea level on dry land.
 

Under this type of pressure, the normal tetrahedron shape of the water molecule is warped. Inside of an organism, this change in water molecule shape prevents biological processes from taking place, thus killing the organism. New research from the University of Leeds shows how fishes living at these depths survive otherwise crushing pressure.

 
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