Pressure increases 1 atmosphere for every 10 meters, so a deep-sea organism can experience a range of pressures from 20 atmospheres at the shallowest point to 1100 atmospheres in the deepest.

At the deepest point, this is the equivalent to a column of solid rock 4840 meters (3 miles) high pressing down on you. I don’t think you would make it down there. You would need a James Cameron submarine for that.