NYT on sushi:
Because of health concerns and growing demand, 50 to 60 percent of sushi in the United States is frozen at some point in its journey from the ocean, according to wholesalers. And rare is the sushi restaurant that tells customers upfront that they may be eating fish that has been in deep freeze for up to two years.
Most would be even more surprised to learn that if the sushi has not been frozen, it is illegal to serve it in the United States.
Food and Drug Administration regulations stipulate that fish to be eaten raw ó whether as sushi, sashimi, seviche, or tartare ó must be frozen first, to kill parasites.