Question

why there difficulty in breathing in aquatic animal​

Answer 1

'At the same time, breathing underwater is difficult because of the low solubility of oxygen, which makes it hard for aquatic animals to meet the oxygen demand. ... Water insects like these play an important role in the food chain of aquatic ecosystems.

Answer 2

Answer:

because in the water dissolved with the form of Oxygen and the lack of oxygen can breathing in aquatic animal difficult