Raw salmon requires strict temperature control and careful handling because it can carry parasites and bacteria that cause illness. The Centers for Disease Control and Prevention explains that parasites such as Anisakis and bacteria that cause spoilage can make people sick, and regulatory agencies set storage limits to minimize those risks. Practical habits that preserve the cold chain and prevent cross-contamination are the primary defenses against foodborne illness.
Cold chain and refrigeration
Keep raw salmon at 40°F (4°C) or below from purchase until use. The U.S. Department of Agriculture Food Safety and Inspection Service recommends storing raw fish in the refrigerator and using it within 1–2 days to maintain safety and quality. Rapid cooling after purchase, transporting the fish home in an insulated bag, and storing it on the lowest refrigerator shelf in a sealed container reduce the chance of temperature abuse and juices contaminating other foods. Refrigeration slows bacterial growth but does not stop it entirely, so time limits matter.
Freezing and sushi-grade considerations
For longer storage, freeze salmon at 0°F (-18°C) or colder. The U.S. Food and Drug Administration provides guidance that freezing can be used to inactivate parasites when raw fish is intended for raw consumption; many commercial suppliers follow FDA recommendations to freeze fish destined for sushi and sashimi. “Sushi-grade” is a market term rather than a standardized guarantee; it typically means the fish has been handled to reduce parasite risk, often by freezing, but consumers should still follow safe storage and supplier transparency. Freezing preserves safety but can change texture and color, so cultural and culinary preferences influence whether people freeze before preparing raw dishes.
Handling, thawing, and cross-contamination
Thaw salmon in the refrigerator rather than at room temperature to keep the fish below 40°F (4°C) during the entire thawing process. If faster thawing is required, place sealed salmon in cold running water or thaw in a sealed bag in the refrigerator using a cold-water bath, changing the water regularly. Prevent cross-contamination by using dedicated cutting boards and utensils for raw fish and by washing hands and surfaces thoroughly. The Centers for Disease Control and Prevention highlights handwashing and surface sanitation as critical steps to prevent transmission of pathogens from raw seafood to ready-to-eat foods.
Consequences of improper storage include acute foodborne illness, allergic-like reactions from parasites, and spoilage that reduces nutritional and sensory quality. Vulnerable groups such as pregnant people, young children, older adults, and immunocompromised individuals face higher risks and should avoid raw seafood or insist on supplies frozen according to FDA guidance. Wild-caught and farmed salmon differ in parasite risk and environmental exposure, which influences handling decisions and regulation in different regions. Following the simple, evidence-based practices of refrigeration, timely use, proper freezing when needed, and careful handling keeps raw salmon safe while respecting culinary traditions that rely on raw fish.