How Long Seafood Stays Fresh in Your Refrigerator

Raw Fish and Shellfish Last 1 to 2 Days

Raw fish — whether fillets, steaks, or whole fish — keeps for one to two days in the coldest part of your refrigerator, usually the back of the bottom shelf where the temperature stays closest to 32°F (0°C). The clock starts the moment you bring it home, not when the fishmonger wrapped it. If the package is already a day old when you buy it, you have less time than you think.

Raw shellfish — clams, mussels, oysters, and scallops — also lasts one to two days. Store them in a breathable container (not sealed plastic) so they can stay alive and moist without suffocating. If any shells are cracked or won't close when tapped, discard them before storing. Live lobster and crab last three to four days if kept in the coldest part of the fridge, ideally in a perforated container so air circulates.

The reason for the short window is that raw seafood spoils faster than other proteins. Fish flesh has a high moisture content and delicate cell structure that bacteria colonize quickly, even at refrigerator temperature. The colder your fridge runs, the longer the seafood lasts — but no refrigerator temperature stops spoilage entirely, only slows it.

Key Takeaways

• Raw fish and shellfish last one to two days in the coldest part of your refrigerator, starting from the day you buy it.
• Cooked seafood lasts three to four days if stored in an airtight container on a shelf (not the door) where temperature stays steady.
• Frozen seafood lasts three to six months at 0°F or below, but thaw it in the refrigerator overnight rather than at room temperature.
• Store raw fish on the lowest shelf, below ready-to-eat foods, to prevent drips from contaminating other items.
• Smell and texture are your best guides — if it smells sour or ammonia-like, or feels slimy, throw it out regardless of how many days have passed.

Cooked Seafood Lasts 3 to 4 Days

Cooked fish, shrimp, crab, and other cooked seafood lasts three to four days when stored properly. The key is an airtight container — not plastic wrap alone, which lets air in and dries the fish out while allowing odors to escape into the rest of your fridge. Glass containers with locking lids work best because they seal completely and don't absorb fish smell the way plastic does.

Place the container on a middle or upper shelf, not on the door. The door is the warmest part of the refrigerator because it opens and closes constantly, letting warm air in. A shelf with steady, cold air circulation will keep your cooked seafood fresher longer. If you cooked the seafood yourself, let it cool to room temperature before sealing it — trapping steam inside the container speeds up bacterial growth.

Cooked seafood lasts longer than raw because heat kills most of the bacteria present. What remains grows more slowly at refrigerator temperature. However, cooked seafood can still pick up bacteria from cross-contamination, so keep it away from raw meats and unwashed produce.

Frozen Seafood Keeps 3 to 6 Months

Frozen seafood at 0°F (-18°C) or below stays safe to eat for three to six months. The exact length depends on the type — fatty fish like salmon and mackerel last three to four months, while lean fish like cod and flounder last four to six months. The fat in oily fish oxidizes over time, which changes flavor and texture even though the fish remains safe.

Freezing stops bacterial growth entirely, but it does not improve the quality of seafood. Freeze it as soon as possible after purchase. If you buy frozen seafood, the clock has already started — the package may have been frozen for weeks before reaching your store. Use it within the timeframe above from the day you freeze it at home, not from the original freeze date.

Thaw frozen seafood in the refrigerator overnight, never at room temperature. Room-temperature thawing lets bacteria multiply on the surface while the inside is still frozen. A one-pound package typically thaws in twelve to twenty-four hours on a refrigerator shelf. Once thawed, use the seafood within one to two days — do not refreeze it unless you cook it first.

Store Raw Seafood Below Other Foods

Raw seafood drips. Even in a sealed package, condensation and liquid accumulate inside. If you store raw fish above ready-to-eat foods like salads, cheese, or deli meat, those drips will contaminate them with bacteria. Place raw seafood on the lowest shelf of your refrigerator, in a container or on a plate that catches drips, and keep it away from fresh produce and cooked foods.

Use a dedicated shelf if your fridge has one, or at minimum a separate area of the lowest shelf. Wipe up any spills immediately with a paper towel, then wash the shelf with hot soapy water. If raw seafood has been sitting in its own liquid for more than a few hours, drain it and replace the paper towel underneath — standing liquid speeds up spoilage.

Signs That Seafood Has Gone Bad

Smell is the most reliable indicator. Fresh raw fish smells like the ocean — briny and clean. As it spoils, it develops a sour, ammonia-like, or "fishy" smell. If you open the package and recoil, trust that instinct. Cooked seafood should smell like the dish you made, not like old fish.

Texture changes are also a warning. Fresh fish is firm and springs back when you press it. Spoiled fish feels soft, mushy, or slimy. The flesh may also look dull or discolored instead of bright and translucent. Shellfish that smell bad or feel mushy should be discarded. If a clam or mussel shell is open and won't close when tapped, it is dead and should not be eaten.

Do not rely on the date on the package — it is a guideline, not a may provide. Refrigerator temperature, how the fish was handled before you bought it, and how long it sat at the store all affect how fast it spoils. When in doubt, throw it out. Foodborne illness from spoiled seafood is serious and not worth the risk.

How to Extend Seafood Freshness

Keep your refrigerator at 40°F (4°C) or below. Use a refrigerator thermometer to check — many home fridges run warmer than they should, which shortens the shelf life of everything inside. If your fridge is warmer than 40°F, adjust the thermostat and recheck after a few hours.

Buy seafood last when you shop, and get it home quickly. If you are making multiple stops, bring a cooler with ice packs. The longer seafood sits at room temperature or in a warm car, the faster bacteria multiply. If the package feels warm when you get home, cook or freeze it immediately rather than storing it in the fridge.

Store seafood in the coldest part of the fridge — usually the back of the bottom shelf, farthest from the door. The front of shelves and the door are warmer because they are closer to the opening. If your fridge has a dedicated seafood drawer or coldest zone, use it.

Frequently Asked Questions

Can I eat seafood that smells a little fishy?

A mild ocean smell is normal in fresh fish, but a strong, sour, or ammonia-like smell means it has spoiled. If you are unsure, smell it again after a few minutes — the smell usually gets stronger as spoilage progresses. When in doubt, discard it.

What if I thawed seafood and did not use it?

Once thawed in the refrigerator, use it within one to two days. Do not refreeze it unless you cook it first. If you thawed it at room temperature by accident, cook it immediately or throw it out — bacteria multiply quickly at room temperature.

Does vacuum-sealed seafood last longer?

Vacuum sealing removes air, which slows oxidation and bacterial growth slightly. Vacuum-sealed raw fish may last two to three days instead of one to two, but the improvement is modest. It still belongs on the lowest shelf and still needs to be used quickly.

Is it safe to eat seafood that was left out overnight?

No. Seafood left at room temperature for more than two hours (or one hour if the room is above 90°F) should be discarded. Bacteria multiply rapidly at room temperature, and cooking will not make it safe.

How do I know if frozen seafood has freezer burn?

Freezer burn appears as gray-brown spots or ice crystals on the surface. It does not make the seafood unsafe, but it affects texture and flavor. Trim off the worst spots before cooking, or use it in dishes where texture matters less, like fish soup or chowder.