At present, the main catches of fishing boats rounded up by lights are mackerel (mainly Balaam), squid, bonito and a small amount of hairtail. The fishing boats in Shenzhen-Shanghai Fishing Port are mainly light fishing boats and trawlers, and the trawl on the trawler uses the winch on the deck to close the net.

Advantages of prohibiting trawling: it protects the regeneration of fish resources. Disadvantages of banning trawling: Some coastal residents near the lake have little farmland and can only make a living by fishing in the sea. If trawling is prohibited, their survival skills will be destroyed, which will not only arouse their disgust, but also cause unimaginable consequences because of their survival problems.