[koudelka]

> Suddenly bringing up a deep water fish would make it explode. every 33ft up the volume of air doubles.

I could be missing something, but I don't think this is quite correct.

Coming up from the first 33ft (10 meters) of depth, the pressure would go from two bars to one, or half, so the volume would double.

But any deeper, the ratio of pressure between the current depth and ten meters shallower isn't double, it's n/(n - 1).

[glofish]

I used my recollection from diving instruction and looks like I was off, every 33ft (10 meters) adds one ATM pressure, which, in turn, works as you said.

Every ten meters the volume goes down like so 1, 1/2, 1/3, 1/4, 1/5

PS. Fish could still explode tho

[taneq]

Correct, pressure is linear in depth.