Up to two metres long, weighing as much as 700 kilograms, able to sprint as fast as a horse and dive a mile in minutes with a metallic flash, the tuna is one of the kings of the ocean. Like us, it is warm-blooded. Its ability to regulate its body temperature lets it migrate across oceans, swimming thousands of kilometres each year and making it an ideal survivor in a range of conditions. But the tuna cannot survive the ravages of the fishing industry, which is waging a relentless war on its once plentiful kingdom. Urgent action needs to be taken. 2007 may be the last opportunity to save one of the most valuable fish species from commercial extinction.