in space, no one can hear you make sushi

I was amused when I read this article that sushi was going to be included on the menu when a Japanese astronaut heads to the International Space Station. I'm not sure how they keep their food fresh, but I hope they do a good job with the fish. Food poisoning in space would suck. I wish they'd elaborated on what fish they're exactly bringing. Cause, you know, I like those kinds of details.