I have a bag of frozen ahi tuna steaks purchased from Costco. Some of them have been quite tasty when seared. That said, I heartily enjoy raw tuna, so I am intrigued with the idea of trying them raw.
Fwiw, the steaks are not labeled as sushi grade, but I am not sure how much that really matters. From my brief research, it appears that the primary determining factor for what qualifies as sushi grade is the fat & oil content of the fish. That might imply that these wouldn't be as tasty as fresh sushi, but it does not really have any bearing on whether or not these steaks would be good without searing.
Is there any reason that they specifically need to be seared?