Question: what is the difference in sushi grade fish?
Answer: 'Sushi-grade' fish is the term given to fish that shows it is safe to prepare and eat raw. Sushi-grade fish is caught quickly, bled upon capture, gutted soon after, and iced thoroughly. Known parasitic fish, such as salmon, should be frozen at 0°F for 7 days or flash-frozen at -35°F for 15 hours.