My Sushi Salmon was off, violently ill.

I went to Fu Li Hua Asian Cuisine in Emperors palace, when my fianc? and i decided to have sushi the salmon platter to share. I assumed that the sushi would be good quality as it was so expensive, but was I wrong. After a few bites it tasted sour, my fianc? told me it was off and we shouldn't eat it. We left it and decided to leave the restaurant. As soon as I was on my way home I was violently ill.