https://www.chowhound.com/post/sushi-parasites-529982
https://www.cbsnews.com/news/sushi-parasite-anisakiasis-on-the-rise-doctors-warn/
Sushi may carry a dangerous parasite that can eat away at your intestines. A man who had symptoms of vomiting and stomach pain went to the doctor. The doctors showed him a picture of a large white worm that was inside of his intestines. The doctors advised him not to consume completely raw fish. It is best to cook it at a high temperature or freeze it at an extremely low temperature to rid the fish of all parasites before it is consumed. These cases are extremely rare in the United States and tend to occur in older people. Many cases of parasitic worms found in the intestines have been reported in Japan. An extreme case occurred in Japan where parasitic worms ate the insides of an elderly man’s intestines. Sushi is a fun food to eat and is a delicacy. It should be consumed with caution at reputable and certified restaurants.