At least that is what a new study by Oceana.org seems to indicate.
A post on ZeroHedge claims that:
The non-profit group Oceana took samples of 1,215 fish sold in the U.S. and genetic tests found that that 59% of those labeled tuna were mislabeled.
What’s worse is that the fish that you might be getting instead may cause certain embarrassing problems:
It seems that “white tuna” should be avoided in particular as “84% of fish samples labeled “white tuna” were actually escolar, a fish that can cause prolonged, uncontrollable, oily anal leakage.”