When mention about marine environmental problems, people always give priority to the pollution of the ocean by the discharge of plastic waste. However, many marine organisms move and receive information by means of sound waves. When the ocean is affected by artificial sonar, it also affects the work and rest of marine organisms, resulting in death. I think it is inevitable to use sonar, but we can try not to overfish marine organisms and reduce the pollution Ships sail, allowing fish to reduce the impact of ocean noise.