The world of bluefin tuna, while diminishing, is a lens into the culture and ethics of fishing; it also reflects a nation’s history. Within all this, of course, are two questions: First, how did this fish go from being low-grade cat food to the most expensive fish in the world? And why can’t we stop eating it?

Source: Bluefin Tuna Is the Most Coveted Fish in the Sea — and It’s Nearing Extinction