Costco does sell "sashimi quality" fish, but that's not quite the same thing as sushi or sashimi-grade. Still, not one of these terms has a concrete definition, anyway. Sushi-grade fish is an ...

If you've tried Costco's Kirkland canned tuna, you know this is one of the pantry essentials that makes your annual membership worthwhile. It's solid white albacore tuna packed in water ...