How do fish survive in deep sea and why do they die when you take them to water higher up?
In: Biology
Basically, pressure isn’t a problem to living things. *Change in pressure* is the problem. A living thing that lives its whole life at deep pressure is adapted to that pressure, and most of those organisms can only survive a narrow pressure range. Getting out of that range would require many generations, each moving a bit further.
Only a few complex organisms can survive dramatic changes in pressure, and they require some pretty extensive adaptions to do so.
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