Someone's been watching too much X-Men

But Professor, their DNA may become unstable and what if the mutants can breed? 

Dear God, it's an abomination, a frankenfish, it's, it's, hmmm quite tasty actually...

Lord Melchett, policy director at the Soil Association, said the new technology is not worth the risk.

"Once you have bombarded an animal with other genes, the DNA is unstable, and there is no guarantee these fish remain sterile. It poses far too great a risk to wild salmon. A fish that grows that quickly is likely to lose some of its environmental benefits. There is no such thing as a free salmon lunch and we will pay the price," he said.