Can i eat frozen salmon from costco raw (as sashimi)?

Eat Healthy : If the salmon is sushi grade, why not? It is better to ask the store in charge in seafood to be sure.

Yes: Most of the salmon you eat in a sushi shop has been previously frozen, although fish suppliers may hold out the best fish segments for their commercial customers.

Not advised: Sushi grade fish in general is taken very seriously in terms of processing. Frozen fish that is not marketed as sushi grade may be less well handled and processed. Ask the fish person.