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Anyone who eats fish can get ciguatera or scombroid poisoning. In the United States, fish poisoning is more common in Hawaii, Florida, New York, Washington and Connecticut.
1.Ciguatera (say: seeg-wha-terra) poisoning: This happens when you eat a reef fish (any fish living in warm tropical water) that has eaten a certain poisonous food. This poison does not go away when the fish is cooked or frozen.
2.Scombroid poisoning: A substance like histamine builds up in some fish when they get too warm after they're caught. Histamine is a chemical that serves as a kind of alarm to let your immune system know that an infection is attacking part of the body. If you eat a fish that was not properly cooled after it was caught, you may react to the histamine that is released into your body.