Sushi has become a staple of nearly every American's diet—yet most of us have no clue about the economics and environmental impact involved in getting fish from the sea to our plates. From Los Angeles to Japan, host Sasha Issenberg—journalist and author of The Sushi Economy—follows the trail of the threatened Pacific bluefin tuna to find out if our appetite for sushi just might end up devouring this diamond of the sea.WATCH: More episodes of The Politics of FoodThis first appeared on MUNCHIES in May 2015.Subscribe here for more MUNCHIES!