Recent studies by researchers in North America and Europe harnessing the new techniques have consistently found that 20 to 25 percent of the seafood products they check are fraudulently identified, fish geneticists say.
http://www.nytimes.com/2011/05/27/science/earth/27fish.html?ref=earth
http://www.nytimes.com/2011/05/27/science/earth/27fish.html?ref=earth