[masraum]

Originally Posted by jyl

This makes me wonder if humans could be adapted to extreme deep sea pressures by 1) flooding lungs and sinuses with water, 2) somehow suppressing the gag/choke reflex, 3) artificially oxygenating blood (basically an ECMO machine).

Many years ago a fluid was developed that contained oxygen and could be "breathed". It's one of the things used in the film Abyss, I believe.

My understanding is that the main problem in a person actually breathing the fluid is that the fluid is denser, heavier, and more viscous than a gas (air). We are not used to or designed/adapted to breathing that fluid, and trying to do that would not go well long term. This is something that I remember from various videos and things that I've read over the years. I could have some details off.