Scientists warn a court ruling that allows large commercial fishing boats in waters near cities may deplete fish stocks.

Longlining typically targets tuna, marlin and swordfish, but the fishing method has been criticised for not being selective. Rays, turtles, marine mammals and seabirds are also caught as bycatch.

Modern fishing has reached a whole new level ... massive catches with incredible efficiency. Learn how purse seine nets work, why this method is preferred for capturing large schools of tuna ...