3 Types of Fish You Should Eat in Moderation, According to Food Safety Experts

Some fish may require extra caution because of contaminants or parasites.

Fish is widely recognized as one of the healthiest sources of protein, providing omega-3 fatty acids, vitamins, and essential minerals that support heart and brain health. However, food safety experts note that not every type of fish should be eaten without limits. Certain species may accumulate contaminants or carry parasites depending on where they are caught, stored, or prepared. Choosing fish carefully and following proper cooking practices can help reduce potential health risks.

Experts recommend paying special attention to three categories of fish.

The first group includes large predatory ocean fish such as tuna and swordfish. Because these fish are near the top of the food chain and live longer than many smaller species, they can accumulate higher levels of mercury over time. Excessive mercury exposure may affect the nervous system, particularly in pregnant women, developing fetuses, and young children. Health authorities often recommend limiting consumption of high-mercury fish and choosing lower-mercury alternatives more frequently.

The second category is frozen ocean fish that has been stored for an extended period or repeatedly thawed and refrozen. Poor storage conditions can reduce quality and increase the risk of spoilage. Fish that develops an unpleasant odor, discoloration, or unusual texture should be discarded rather than consumed.

The third category includes freshwater fish from unknown or unregulated sources. Depending on the environment, some freshwater fish may carry parasites or be exposed to contaminated water. Thorough cooking and purchasing from reputable suppliers greatly reduce these risks.

Food safety specialists also recommend several practical habits when buying and preparing fish.

When purchasing fresh fish, look for clear, bright eyes rather than cloudy ones. The gills should appear bright red or pink with no unpleasant smell, while the flesh should feel firm and spring back when pressed gently.

Cooking methods also matter. Steaming, boiling, or baking fish helps preserve nutrients while avoiding the formation of potentially harmful compounds associated with excessive high-temperature frying. If grilling fish, wrapping it in foil may help reduce charring.

Experts also suggest removing internal organs promptly after cleaning fish and paying attention to hygiene throughout preparation to minimize contamination.

Moderation is another important consideration. For most healthy adults, eating fish several times per week as part of a balanced diet provides nutritional benefits while maintaining a varied intake of different seafood species.

People with specific health conditions may require additional dietary guidance. Individuals with gout, seafood allergies, or certain medical conditions should consult their healthcare provider regarding the most appropriate types and amounts of fish to consume.

Ultimately, fish remains an excellent source of high-quality nutrition. By choosing fresh products, purchasing from trusted suppliers, storing seafood correctly, and cooking it thoroughly, consumers can continue enjoying the many health benefits of fish while reducing potential food safety risks.