[DCBryan1]

So what happens to the human body at that depth if the sub hull was compromised?

Ive heard the bodies atomize, "explode" in a spark, look like a crushed coke can, etc. So what really happens? Will their be any remains found if the hull was breached?

[GingisK]

It is my understanding that any gasses or dissolved gasses will be immediately absorbed by the water. Portions of the body containing those will be greatly compressed, including porous regions of bones. It is likely much of the body will be smeared into nothingness as the water is forced into permeable tissue. Some portions of bones will remain intact.

This is a different outcome when compared to a gradual application of pressure, where pressure equalization can occur, sort of like the diffusion of paraffin into cells during the preparation of microscope slides.

When the US brought up the Soviet submarine K-129 using the Hughes Glomar Explorer, they found little tiny drinking cups that used to be plastic foam coffee cups. Six bodies were recovered, placed in a metal container, and given a formal Burial at Sea. The condition of those remains was never disclosed.

5,000 pounds per square inch is a lot of pressure.