For too long we've held a highly romanticised view of the fishing industry, one of bountiful seas and hardworking fishermen who risk all to put fish on our plate. Only recently are we starting to get a glimpse of the truth. A high-technology industry run by very wealthy people who are systematically emptying the world's ocean for profit. And that's just the half of it, if we knew the full truth about what goes on out at sea far beyond prying eyes, there would be an outcry.
All commercial fishing is destructive but there are three methods which stick out as particularly damaging - bottom-trawling, purse-seining and long-lining.
Most of us will never get a chance to view these fishing methods first-hand, so here are three short videos which will give you a flavour of what is happening to the world's ocean.