Shortly before Thanksgiving 2015, the FDA granted final approval for thej sale of genetically modified salmon, making this very nutritious fish the first GMO animal the U.S. government has allowed on the market.   Although genetically modified plant products are ingredients in roughly 70% of processed American foods with no labeling required,  the EWG (Environmental Working Group) and other consumer advocacy groups are making more news by objecting (primarily through online campaigns) to the fact that, once GE salmon is in stores, consumers may have no way of telling the modified salmon from conventional salmon.  The argument is that we have a right to know the nature of the food we're buying and eating.  The underlying concern: fear that the product could be harmful to human health.