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Old 07-08-2021, 09:28 AM   #48
Whimsey
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Default All sushi has probably been frozen

Quote:
Originally Posted by FlyingScot View Post
Absolutely--the freeze/thaw cycle breaks down proteins in fish and anything else. Some of the impact depends on the specific fish and your palate. A previously frozen Filet-O-Fish is delicious. But very few sushi eaters would enjoy previously frozen tuna, and (I think) most grilled salmon eaters would notice the downgrade to frozen salmon instead of fresh.
FDA guidelines which dictate that fish sold for raw consumption be frozen under one of the following conditions to kill parasites:

-4°F (-20°C) or below for 7 days (total time)
-31°F (-35°C) or below until solid, and storing at -31°F (-35°C) or below for 15 hours
-31°F (-35°C) or below until solid and storing at -4°F (-20°C) or below for 24 hours
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