Live stream from 2000m depth - now -

[Jackalope]

It's a wonder how anything can survive in those conditions

Sort of radishes the fine-tuning argument, dunnit?  At 2000m, water pressure is about 400 000 pounds per square foot (and no, I didn't do all those tedious calculations and conversions, I looked it up).  Considering that this roughly 4000 times the pressure we experience walking along the beach, even the toughest of God's 'special creations' at the depth would be crushed to a vaguely jelly-like substance.

Boru

Only those with air spaces that can't equalize. . You'd use a metric asston of breathing gas - if the oxygen toxicity didn't kill you long before that.

I think there's something wrong with your second figure - 2000 meters is approximately 200 atmospheres pressure (the increase is 1 atmosphere per ten meters). Yes, it over 400,000/lb/ft2 which is ~3000psi (14.7 psi at 1/atm * 200). I think you mixed units there.