Who Is Responsible for Food Poisoning From Fish?

 Posted on September 22, 2026 in Food Poisoning

Fish and shellfish can carry risks that other foods don't. Fish are subject to bacteria or viruses picked up during storage or handling like other foods. Fish can also come with toxins that build up in the fish itself, though.

If you got sick after eating fish in 2026, an Illinois food poisoning attorney can help you figure out where the problem originated and who may owe you compensation.

What Causes Food Poisoning From Fish?

Fish-related illness usually falls into one of two categories.

The first is contamination. Bacteria or viruses like Vibrio, Salmonella, or norovirus can get into fish or shellfish through improper handling, storage, or undercooking. Raw oysters and other raw shellfish carry a higher risk for these contaminants than cooked fish does.

The second category is sickness from a naturally occurring compound in the fish. Scombroid poisoning happens when certain fish aren't refrigerated properly after being caught. Fish like tuna or mackerel are more prone to this. Bacteria in the fish then produce histamine. This excess of histamine can cause flushing, headaches, and stomach cramps. These symptoms can look very similar to an allergic reaction, according to the American Academy of Allergy, Asthma, and Immunology. Cooking doesn't destroy the histamines.

Ciguatera is another type of poisoning that comes from a neurotoxin that some reef fish, like grouper or barracuda, pick up from eating smaller fish. These smaller fish eat algae that contains chemicals that are toxic to people. Ciguatera is one of the more common types of poisoning caused by marine toxins, and cooking does not destroy the toxin.

Who Can Be Held Responsible for Food Poisoning From Fish in Illinois?

Sellers have a duty not to sell contaminated or adulterated food, just like with any other product (410 ILCS 620/3.1). If contamination happened near the beginning of the supply chain, a distributor or fishery may share responsibility under product liability law.

Liability can depend on where the fish became unsafe and which business was responsible for handling, storing, or selling it. A restaurant may be liable for negligence if it undercooks fish, stores it at the wrong temperature, or lets it cross-contaminate with other food. A grocery store or seafood market can also be responsible if it sells fish past its safe date or sources it from an unsafe supplier. Scombroid can develop when fish is not kept cold enough, while ciguatera comes from toxins that build up in certain reef fish. Businesses in the supply chain could be responsible if unsafe fish reaches consumers.

What Do You Have to Prove in an Illinois Food Poisoning Claim About Fish?

To have a valid claim, you need to show that the fish you ate was contaminated or toxic. You also need to show that your illness was directly related to this contamination, and that the business or supplier involved failed in its duty to provide safe food.

Stool tests or other lab work can help identify some bacterial causes of food poisoning. Scombroid and ciguatera are usually diagnosed based on symptoms, what fish was eaten, and other evidence. Medical records showing when your symptoms started, compared to when you ate the fish, can also be helpful. Keep an eye out for known outbreaks of food poisoning in your area, especially if you suspect poisoning from toxic fish rather than contamination. Scombroid and ciguatera cannot be tested for the same way something like Salmonella can.

What Should You Do If You Think Fish Made You Sick in Illinois?

If you think bad fish made you sick, take the following steps:

• See a doctor, especially if symptoms match up with scombroid or ciguatera poisoning. Many people recover from scombroid or ciguatera, but you may need additional medical help to stabilize your condition.

• Ask your doctor whether testing is needed to determine the cause of your illness.

• Write down what you ate, where, and when your symptoms began.

• Keep any leftover food, packaging, or a receipt from the meal if you have one.

• Report the illness to your local health department.

Illinois generally gives you two years to file a personal injury lawsuit, although the exact deadline depends on when the claim accrued (735 ILCS 5/13-202).

Call an Illinois Food Poisoning Attorney Today

Fish-related food poisoning can range from a rough day to a hospital stay, depending on the toxin or bacteria involved.

Our Illinois personal injury lawyers focus on cases like these. We've recovered millions of dollars in verdicts and settlements for people harmed by contaminated food, including clients who were hospitalized and later recovered fully. Call Newland & Newland, LLP at 312-981-0409 today for a free consultation.