World Wild life Fund (WWF) will fight to hinder what they call genetic pollution of the wild cod stock. The big problem is that larvae of farmed fish falls through the net cage and to the sea bed, where manages to survive and live free. – If wild cod and farmed fish cross breeds, the genetic modified cods from fish farming will affect the wild cod’s size and ability to survive, says Nina Jensen of WWF Norway to NRK. Norwegian codfarmers says that WWF exaggerate. It is a very small amount of fish which manage to survive like this, and it is therefore not a threat to the wild cod.