A fish farm in Galaxidi, GreeceAs demand for aquatic food soars, the world’s fish stock are approaching their limits. According to Tony Long, chief executive of Global Fishing Watch, this reflects a hard limit: ‘Wild stocks are at their limit of exploitation. The global fishing industry plays a critical role in feeding the world, but it can also pose serious environmental risks when not managed responsibly. Image: ShutterstockIn 1974, 90 per cent of global fish stocks were within biologically sustainable levels. In all, just ten countries account for 70 per cent of the world’s aquatic animal food consumption.