On: Scientists Find Worms in Almost Every Fish in a Tuna Haul – 96% Were Infected

[nekusar]

So what makes raw fish safe is that the fish is froze at a temp for a period of time. Its different depending on temp and duration.

But the cold kills the parasites. Its why "sashimi grade fish" is safe.

[Rooster61 → nekusar]

> "sashimi grade fish"

This term has no legal definition and is unregulated. A fish caught, cut, and thrown on a plate as sashimi could be called sashimi grade having never touched a freezer to kill off parasites.