The Earth's overexploited seas are in danger of turning into the Last Frontier. In giant, demonic trawls, the World's oceans are being systematically emptied of their marine life - from dumb tuna to pixie-like, intelligent dolphins. The unsustainable fishing recently - into an armed face-off. A troublesome peace arrived reconciliation. A UN conference on straddling fish stocks has sought to set up a global framework on utilising marine resources. But in a world fast running out of calories, the chances of a maritime conflagration can only increase. Down To Earth dives into the depths of these tangled issues