How do fish/animals that habitate the ocean floor survive the deep sea pressure that most submarines can’t handle?

Question

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

Answer 1

If you filled the submarine with water then you’d basically have the same as a fish, they aren’t hollow on the inside like a submarine full of air.