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I agree w/Ed. Read an article about this - Pressure at the surface is 1 atmosphere, equal to the weight of all the above air. At 32.8 feet below, pressure is 2 atmospheres. Normal barometric pressure is about 30 inches. Strong pressure is about 32.7 inches. A hurricane can drop it to 28 or so. The difference of 2.7 inches of barometric pressure is about equal to .09 atmospheres. That’s equivalent to a fish moving up the water column 3.28 feet! The pressure in the ocean is much greater (about 800 times) than atmospheric pressure.
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