Everyone, I posted this on wfd as well, but no responses there.
“I’m inspired by the various sushi/sashimi pix above, and have a question for you guys. A couple of months ago, I bought frozen tuna steak pieces from a reputable Asian grocery. But they weren’t labeled sashimi or sushi grade. They look pristine. Can we eat them raw without getting sick? And if not (parasites?), will turning it into ceviche cure the problem? Otherwise, I’ll just sear maybe with a sesame crust. Thank you.”