http://qz.com/55699/59-percent-of-americas-tuna-isnt-actually-tuna/ 
It's not horse, but it'll do. AP/Itsuo Inouye
Nonprofit ocean protection group Oceana took 1,215 samples of fish from across the United States and genetically tested them in order to bring us the following astonishing facts:
- 59% of the fish labeled “tuna” sold at restaurants and grocery stores in the US is not tuna.
- Sushi restaurants were far more likely to mislabel their fish than grocery stores or other restaurants.
What’s for dinner at your local sushi joint? Pretty much anything but what’s on the menu.Oceana
- In Chicago, Austin, New York, and Washington DC, every single sushi restaurant sampled sold mislabeled tuna.
- 84% of fish samples labeled “white tuna” were actually escolar, a fish that can cause prolonged, uncontrollable, oily anal leakage.
- The only fish more likely to be misrepresented than tuna was snapper, which was mislabeled 87% of the time, and was in actuality any of six different species.
If you’ve ever wondered why the sushi in the display case is so affordable, given thedire state of the world’s tuna supply, well, now you know.
