Question

There is high pressure on the bottom of sea, then how animals survive?

Answer 1

There is high pressure at the bottom of the sea. To balance out this pressure, the fishes and other sea animals have extra air dissolved in their blood. This internal fluid pressure balances the high pressure and animals are able to survive. This is the reason why fishes die then they are brought out of water because outside water the internal fluid pressure exceeds the external atmospheric pressure and their veins burst.