Fishing by blocking the river net only needs to be fixed from the net on both sides of the river. To fish with a net, you must first determine the size of the net, and you can't use a net that is too thin, otherwise the small fish can't get through. The net should be placed in a place where the current is relatively still, and the water should not be too deep and should not exceed half a meter of the fishing net. After arranging the fishing net, you can catch fish. Spread some bait upstream to attract fish, then drive them to the direction of the fishing net and finally close the net.
Trawl is a kind of movable filtering fishing gear, which relies on the power of fishing boats to drag bag-shaped fishing gear and forcibly drag animals in the water into the net in the waters it passes through, thus achieving the purpose of fishing.