Long Line Fishing consists of several miles of hooks and line in which commercial fisherman use to catch multiple fish at once. Swordfish has been one of the most sought after long line fish, but they are not the only species of big game fish that are commercial fished around the world.
The biggest problem with long line fishing is the by catch. Fish such as White Marlin, Sea Turtles, and many more species are caught while targeted other fish and usually dead and discarded from sitting on the long line too long. Long-line fishing is controversial because the lines can lead to significant bycatch, often of endangered species such as sea turtles and albatrosses.
Commercial fishermen are asked to use special circle hooks to eliminate, but this does not eliminate the death of bycatch all the time.
Commercial fish boats range from 25 feet to over 100 feet and are usually spend several days out at sea in order to catch a profit of fish.