Question

How do aquatic animals get oxygen and survive

Answer 1

Most aquatic animals need to obtain O2 from the surrounding water in order to carry on cellular respiration. As we have seen, the amount of O2 in water is limited, and both O2 solubility and demand are correlated with temperature. At most, there is only about 15 mg of O2 per liter of water. In order to carry out the chemical reactions needed to maintain life and reproduce, aquatic organisms must be able to efficiently extract that 15 mg of O2 from the water.

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Answer 2

Hi

some have gills (fish and sharks have something simmilar) which suck in water and then seperate the oxygen out of the water.
Some water animals like the dolphin and the whale have to swim to the surface to breathe. this is what a hales blowhole is for. Some animals can hold their breath under water for up to 3 days!

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