The terms "sushi grade" and "sashimi
grade" are commonly used by seafood retailers to indicate that a particular product is considered suitable and safe for raw consumption. However, it's very important to understand that there is no official, regulated standard or legal definition for "sushi grade" or "sashimi grade" seafood in the United States. These are marketing terms that essentially mean the seller believes the fish has been handled, processed, and often, frozen according to specific guidelines designed to minimize the risk of parasites and bacteria, making it safer to eat raw.
For most wild-caught fish intended for raw consumption (excluding certain large tuna species and some farmed fish), the U.S. Food and Drug Administration (FDA) recommends specific freezing guidelines to destroy
parasites. This typically involves freezing the fish at very low temperatures (e.g., -4°F / -20°C or colder for a set duration, or -31°F / -35°C or colder for a shorter period).