I was reading the health news today and came across this article:
Consumer groups push for label for modified salmon
If you read it, the main point is that a company is trying to get its genetically modified salmon (who'll produce more growth hormone and grow bigger, faster, and for longer) approved for human consumption. But, they don't want to have to label it as genetically-modified fish, but sell it labeled like any other (presumably farm-raised) fish.
"In preliminary analysis released ahead of the hearing, the FDA agreed with the company, saying there were no biologically relevant differences between the engineered salmon and conventional salmon, and there is a reasonable certainty that no harm will come from its consumption."
The real issue to me is not genetically-modified food vs. non-genetically modified food, although that is a concern. It's the idea that I don't even get to know if the food is modified or not. They'll determine if it's the same, and if so, that's that. You know they're fighting it because they think people will shy away from GMO fish - if they thought it would be a selling point they'd argue to be allowed to include it.