Since most sushi or sashimi includes raw seafood ingredients, it is essential to know how to select the correct fish, and how to keep it fresh. Proper food-safety precautions are the key to creating good sushi, as this will minimise the risk of foodborne illnesses associated with eating raw fish.
Raw fish is not something to be afraid of. Virtually every fish or sea creature is edible, it’s just that not every fish can be eaten raw. Knowing which sources are safe is the best place to start when choosing your sushi ingredients.
‘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. This will kill any parasites, making the fish safe for consumption.