Anonymous asked: probably a really stupid question, but how come fish that live in the really deep sea dont get squished by the weight of the water? cuz there must be a lot of pressure on them, and i know that if you put stuff at the bottom of the ocean-like say a toy or something-it'll get completely flattened, why doesnt this happen to fish? do they have really strong bone structures? if so, shouldnt we be modeling stuff after fish skeletons cuz they must be really strong
They aren’t super strong, they just have internal pressures equal to external pressure of the water. So, if you take a deep-sea fish to higher sea levels, it will literally EXPLODE because it’s internal pressure is designed to push back against all of that pressure.
The trickier problem to solve is how do sperm whales survive at lots of different water pressures without exploding or being crushed. This is especially important in mammals as they have lungs which contain air which is particularly susceptible to alternations by pressure. You can read all about how sperm whales deal with this here.
It’s fascinating…their lungs actually COLLAPSE at depth, preventing any kind of gas exchange at all. The oxygen they need for these deep dives is stored in massive quantities of blood with massive quantities of hemoglobin and also in special oxygen-storage proteins in their muscles.