The FDA has now declared an answer to the first question, proclaiming GM salmon safe for consumption. For the FDA, the lack of convincing scientific evidence that GM salmon is unsafe for human consumption is good enough to declare that it is safe.
This is lousy logic, but that is the way the FDA works. The kind of scientific research that could document the real health concerns about GM salmon takes a lot of time and a lot of money, money that just isn’t available from public or private sources. The biotech industry proclaims that the gene-altered fish is safe and it doesn’t seem to matter that these companies have an obvious financial interest in saying so.