Trawling The use of fishing vessels to tow bag-shaped nets, forcing fishing objects into the net for fishing operations. Can actively and flexibly tow the fishing group. Mainly used in the ocean, inland waters are also used. The fishing targets are mainly bottom and near-bottom fish, shrimp and mollusks, such as oysters, clams, octopus, horse lice, large yellow croaker, small yellow croaker, squid, calamari, clams, shrimps, crabs and Qinghai Lake in the land waters, naked knives, silver carp, white shrimp and so on. Trawling is one of the most important fishing methods in modern times.
Trawling can be divided into two types: sleeved trawl and sleeveless trawl. Sleeve trawling generally has 1 net bag and 2 net sleeves. The nets are equipped with the appropriate number of floats and sinks to make the net opening vertically. It is the main structural form of ocean trawling, and inland waters are also used, but on a smaller scale. Sleeveless trawls are available in sleeveless single-pocket and sleeveless multi-caps.