Bottom trawling is an industrial fishing method that involves dragging weighted nets across the seafloor to catch marine life that live on/near the bottom. Heavy steel ‘trawl doors’ are attached to the sides of the trawl net and dig into the seafloor. The trawl doors also act to keep the net’s mouth open and assist in herding fish into the back of the net – called the cod-end. Bottom trawling occurs both in the inshore and deepwater fishery.