Symptoms depend on the type of toxin in the fish.
Ciguatera is a type of toxin that can build up in older fish. Cooking the fish doesn't get rid of the toxin.
About 2 to 8 hours after eating the fish, you feel:
Later, you feel:
Symptoms can last for several months.
Puffer fish (fugu) contains a dangerous toxin. Cooking or freezing the fish doesn't get rid of the toxin.
If you think you or someone else may have puffer fish poisoning, call for emergency medical assistance (911 in most areas of the United States) or go to the hospital right away.
Scombroid is a toxin that grows in certain kinds of fish (mackerel, tuna, and bonito) if the fish isn't stored or refrigerated properly.
The fish may taste bitter or peppery.
Symptoms of scombroid poisoning:
Shellfish poisoning comes from eating shellfish, such as mussels, clams, oysters and scallops, that contain a poison called saxitoxin.
Cooking shellfish doesn't prevent poisoning.
Symptoms of shellfish poisoning:
Specific treatments depend on the type of poison.