“Dieseling happens at 300 psi, more or less. Water pressure about 700 feet down would be 300 psi. A hull failure with a water leak below 700 feet would instantly “diesel” any organic material, like, say bodies, such that one wouldn’t expect to find anything but ash. That’s one reason we don’t bother to look for bodies in submarine wrecks.”
Whales dive to 12,000 feet.
Whales don’t suddenly go from 14.6 lbs/psi to 6,000.
The whale does not live inside a bubble with air pressure from the surface. It’s different...
Whales dive: true enough but they are “free divers.” Their body absorbs the water pressure and they’re built to not be bothered by the Bends when they come back up. Humans can free dive to maybe 300 feet, but are limited to maybe two minutes so’s they don’t absorb high pressure nitrogen.