Anisakiasis is an infection caused by consuming raw or undercooked seafood contaminated with larvae of the Anisakis parasite. This condition can lead to gastrointestinal symptoms such as abdominal pain, nausea, and vomiting. It is most commonly associated with eating fish like herring, cod, and squid. The larvae can invade the stomach or intestines, causing inflammation and discomfort. Diagnosis typically involves imaging studies or endoscopy, and treatment may require medication or, in severe cases, surgical intervention. Proper cooking and freezing of seafood can help prevent anisakiasis.