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Usually outside the four corners of the cage, a mesh is surrounded by a larger mesh to protect the net. Periodically try to use a gill net between the guard net and the cage to test whether the cage escapes fish.
Put 10 red snappers in each cage, and see if the number of red snappers has decreased during the day of feeding to understand the fish escape situation.
The fish that had just been placed in the cage began to swim along the edge of the net before some of the fish began to jump upwards. The phenomenon of jump was the most in the night and gradually eased after the second day. Therefore, special attention should be paid to the escape of fish after just stocking.
In aquaculture, if one day suddenly discovers that the fish population has lost its conditioned reflex on the lure, the weather and the water quality have not changed significantly. At this time, we will be alert to the presence of holes in the cage. Because there are holes, not only some fish escape, but the rest of the fish are not stable, and they lose their reaction to feeding.
Check frequently and check at least once a week. Usually on a small day, check in the morning or after noon feeding. Check the net first, and pay special attention to the section of water that is 30 cm below the water. Due to the impact of floating objects, it is easily damaged and causes fish to escape. After checking the net, check the points where the bottom net and the bottom frame are connected. Nets in these places are prone to wear or tear to form loopholes.
Prepare a small cage of 4 to 5 square meters in advance to use when the cage is moving. When you are ready to move the cage, place the small cage below the corner of the cage. Focus the fish on the corner and spread out the small cage so that the corner of the fish is doubled and carefully moved. It can reduce cage fish escape.