Yes, in fact, of the some 20 million metric tons of fish caught annually around the world for uses other than consuming, 90 percent are fish that are perfectly good to eat, such as sardines, anchovies and herring, a new study finds. About 27 percent of ocean fish caught became fishmeal or fishoil. And most of the fish species were either food-grade (used as food somewhere in the world) or prime-food-grade (widely accepted as food everywhere)