The term 'FISH BY DRAGGING A NET' can be summarized as trawling, which is a fishing technique that involves dragging a large net through the water. This method is used to catch a wide variety of fish and other aquatic animals, such as shrimp and crabs. It is one of the most common commercial fishing techniques, and is used by both small-scale and large-scale fishermen. Trawling is also used for scientific research, as it allows researchers to collect data on the abundance and diversity of species in a given area.