The most effective way to repel fish underwater

1, the use of low-frequency sonar or ultrasonic equipment: low-frequency sonar or ultrasonic equipment can produce a sound that makes certain aquatic animals feel uncomfortable, so as to drive away to the rest of the place. This method is effective for small schools of fish and has limited effect on the capture of large fish. By emitting sound waves or ultrasonic waves at a specific frequency, the behavior and navigation abilities of fish can be interfered with so that they leave a specific area.

2. Artificial scaring: Artificial scaring is a common method of repelling fish underwater. By creating stimuli such as sound, light, electric current or air curtain, it can make the fish feel uneasy and thus drive away from the target area. For example, the use of sound devices to make noise, the use of flash lights or lasers to create a strong light stimulus, and the formation of barriers through electric currents or air bubble curtains can all serve to repel fish.

3, the use of light, electricity or air curtains and other means: In addition to sound stimulation, you can also use light, electricity or air curtains and other means to drive away fish. For example, the use of bright light irradiation of the water surface, so that the fish feel uncomfortable, so as to leave the target area. Barriers can also be created by releasing electrical currents in the water or forming bubble curtains to prevent fish from entering a specific area.