A new investigation has revealed appalling labour conditions for Burmese migrants working onboard boats supplying 'trash fish' for use in feed given to farmed prawns. But this is just the latest scandal to engulf the global shrimp industry, says Andrew Wasley
Our oceans are suffering from chronic overfishing - but are fish farms any better for the environment? Matilda Lee weighs up the piscine pros and cons in the battle to save world stocks from collapse.