"There is certainly a risk if the consumer ate the fish raw and the worms were still viable. If they cooked the fish (even as low as 60C) or froze the fish for more than a few days, the larvae would likely have been killed. Both Anisakis and Pseudoterranova may be present in cod and other marine fishes. Humans are dead-end hosts for these parasites and are not truly infected by them. Both parasites "recognise" that they are not in an appropriate definitive host (marine mammal) and move around trying to find the right environment. In the case of Anisakis this may mean penetrating the intestine, while Pseudoterranova are not as severe as they are generally coughed or vomited up. There is no drug treatment for anisakiasis and if the worms survive, the worst case scenario is that the patient develops severe abdominal pain and requires endoscopy and/or exploratory surgery. Best case scenario would be that the worms will simply die in the intestine and not cause any problems."