Trawling is an industrial method of fishing that involves pulling a fishing net, that is heavily weighted to keep it on the seafloor, through the water behind one or more boats. The net used for trawling is called a trawl. This principle requires netting bags which are towed through water to catch different species of fishes or sometimes targeted species. Trawls are often called towed gear or dragged gear.
Setting a trawl
Bottom trawling
Nets for trawling in surface waters and for trawling in deep water and over the bottom. Note the "tangles" with ensnared marine life
Trawl catch of myctophids and glass shrimp from the bottom at greater than 200 meters depth
Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment, but may also be caught from stocked bodies of water such as ponds, canals, park wetlands and reservoirs. Fishing techniques include hand-gathering, spearing, netting, angling, shooting and trapping, as well as more destructive and often illegal techniques such as electrocution, blasting and poisoning.
Stilts fishermen, Sri Lanka
Fishing with nets, Mexico
Fishing tools from the Mesolithic and Neolithic period
Painting of A Brixham trawler by William Adolphus Knell. The painting is now in the National Maritime Museum.