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how do the marine invertebrates and fishes live at great depth in oceans where the pressure could be >100 times the normal atmospheric pressure and do they have any special enzymes?
The animals have a developed ways to cope with the deep ocean's intense water pressure. This force, which is the result of the weight of a column of water pushing down, is so strong in the bathypelagic zone that it would crush anything with air in it. That would be a problem for most fish, since many of them have a gas-filled organ called a swim bladder a large, thin-walled sac in some fishes that may function in several ways, e.g., as a buoyant float, a sound producer and receptor, and a respiratory organ. that helps them stabilize their bodies at different water depths. But many deep-sea fish have adapted to life without a swim bladder. Without the bladders, deep-sea fishes don't have gas spaces in them that would cause them to get crushed.


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