Longlines are a type of fishing gear used to catch various species of fish. They consist of a main line that can be several miles long, with numerous shorter lines, called branch lines, attached at intervals. Each branch line has a hook, allowing fishermen to target multiple fish at once. Longlines can be used in both commercial and recreational fishing. This method is often employed to catch species like tuna, swordfish, and cod. While effective, longlining can also pose risks to non-target species, such as sea turtles and seabirds, leading to concerns about bycatch and environmental impact.