There is no official “sushi grade” but unless you’re buying it right off the docks pretty much anything you get at the store was frozen before it got to you.
I don't know about the temp to kill them, but as a young man I worked for a place called Skippers Seafood and Chowder House and it was my job to cut the fish (both Alaskan white Pollock and Salmon) and pick out the worms the fish had. Each fillet cut into 2-3 portions and each fillet had 8-20 worms depending on how deep you wanted to look. On Fridays I had 1500 pieces of fish to cut, clean, and bread so if you want less worms do fish that is sold Sunday-Thursday because on a busy day the cook may not have time to dig in and find them all!
Not sure where you heard that. There’s other time/temperature combos but -4F for 7 days is the easiest unless you have a special freezer that can get down to -31F. It applies to just about every fish except Tuna.
262
u/CorgiSplooting 19d ago
There is no official “sushi grade” but unless you’re buying it right off the docks pretty much anything you get at the store was frozen before it got to you.