Watching the “High Seas” episode of Our Planet and watching camera crews in these special pressure-resistant submarines capture footage of some pretty fragile looking fish, some of them are pretty sizable too. How are they not crush by the weight of the depths?
In: Biology
Because a submersible is filled with a gas that is at a pressure that humans can tolerate. So the submersible has to withstand an insane level of crushing pressure.
Deep sea fish don’t have a gas filled swim bladder, so there is nothing to compress and crush. Deep sea fish are basically a gel that is the same density of the water. Water doesn’t compress significantly so they can handle that pressure
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