Selecting, Cleaning, and Cutting Fish for Sashimi or Sushi

Sashimi is thin-sliced, very fresh raw fish. Fish is also often used raw in sushi. Any fish that is to be eaten raw should be very fresh.

Freshness depends only partially on when the fish was caught. Suppose you go to the fishmonger around ten in the morning, and the fishmonger tells you that a fish was caught early on the same morning, so it is very fresh. Does this mean the fish is fresh enough to use in sashimi? The answer is maybe, depending on how the fish was handled after bei