How long does fish last in the fridge?

Fish has the shortest fridge life of any common protein — 1-2 days raw. This is dramatically less than beef (3-5 days) or pork (3-5 days). Fish flesh has weak connective tissue + high water content + neutral pH, all of which accelerate bacterial growth. Time-based discard rules are critical because fish doesn't always show obvious spoilage signs until pathogens have multiplied dangerously.

USDA + FDA standard guidelines:

Raw fish (refrigerated below 40°F):

• Fresh whole fish (gutted): 1-2 days
• Salmon (fillet or steak): 1-2 days
• Tuna (steak): 1-2 days
• White fish (cod, haddock, halibut): 1-2 days
• Trout: 1-2 days
• Mackerel: 1-2 days (especially perishable)
• Sardines (fresh): 1-2 days
• Sole, flounder: 1-2 days
• Sea bass, snapper: 1-2 days

Sushi-grade raw fish (for sashimi): - 24 hours maximum at refrigeration temperatures - Some restaurants do 4-12 hours from purchase - Look for "previously frozen" labeling on sushi-grade

Cooked fish: - Standard cooked fish: 3-4 days refrigerated - Fish in cooked dishes: 3-4 days - Casseroles + soups containing fish: 3-4 days - Tuna salad (mayo-based): 3-4 days

Smoked fish: - Hot-smoked salmon: 5-7 days unopened, 3-4 days opened - Cold-smoked salmon (lox): 5-7 days unopened, 3-4 days opened - Smoked trout: 5-7 days

Cured + preserved fish: - Gravlax: 7-10 days refrigerated - Pickled herring: 3-4 weeks refrigerated - Canned tuna (unopened): 3-5 years shelf-stable; 3-4 days opened

Frozen fish (raw):

• Lean white fish (cod, haddock, halibut): 6-8 months
• Fatty fish (salmon, mackerel, tuna): 2-3 months (oils oxidize faster)
• Trout: 3-5 months
• Shellfish (shrimp, scallops): 3-6 months
• Whole gutted fish: 6-12 months
• Smoked fish (frozen): 2 months

Why fish lasts shorter than meat:

1. Higher water content: fish flesh is 70-80% water vs. beef 60-70%
2. Weak connective tissue: bacteria penetrate easily
3. Neutral pH (6.5-7): more bacteria-friendly than acidic beef (pH 5.5)
4. Fish-specific bacteria: Pseudomonas, Photobacterium grow at fridge temps
5. Enzymatic breakdown: fish enzymes continue post-death
6. Fat oxidation: unsaturated fish oils degrade fast
7. Bacterial load from cold ocean: different microbes than land animals

The smell test (especially important for fish):

Fresh fish should smell: - Like the ocean (clean, mild brine) - NOT fishy (strong odor = breakdown) - NOT sour or off

Discard if: - Strong "fishy" or ammonia smell - Sliminess on surface - Cloudy eyes (whole fish) - Gray or yellow flesh discoloration - Soft, mushy texture - Brown or beige spots - Sticky surface beyond normal moisture

Visual indicators (fresh fish):

• Eyes (whole fish): clear + slightly bulging
• Gills: bright red or pink
• Flesh: firm + glossy
• No clear "fluid" or excessive moisture pooling

Visual indicators (spoiled fish):

• Eyes: cloudy, sunken, dull
• Gills: brown or gray
• Flesh: soft + dull
• Pooling cloudy liquid in packaging
• Bones separating from flesh easily
• Brown or beige discoloration

Spoilage timeline:

• Day 0: fresh, ocean-smelling
• Day 1: still fresh, slight aging signs
• Day 2: at threshold; should be cooked
• Day 3+: discard regardless of appearance

Fish-specific bacteria + risks:

• Salmonella: common contamination from poor handling
• Listeria monocytogenes: can grow at 40°F (refrigerator temp)
• Clostridium botulinum: in raw fish + smoked vacuum-sealed products
• Histamine-producing bacteria: scombrotoxin from spoiled mackerel/tuna/skipjack
• Scombrotoxin: histamine poisoning from improperly stored tuna/mackerel
• Anisakis worms: parasites in some raw fish; freezing kills (FDA freezing standard: 7 days at -4°F)

Sushi + raw fish safety:

For raw consumption (sashimi, sushi, ceviche, carpaccio): - Buy sushi-grade fish (previously frozen to FDA spec) - Consume within 24 hours of opening - Keep refrigerated until ready to serve - Don't leave at room temp >2 hours

The FDA-required parasite-killing freeze: - -4°F (-20°C) for 7 days, OR - -31°F (-35°C) for 15 hours

Salmon, tuna, mackerel, and other fish used raw must have undergone this freeze (or be from a supplier certified by buyer). Most "sashimi-grade" or "sushi-grade" labels indicate compliance.

Storage best practices:

Raw fish:

1. Coldest part of fridge (below 40°F, ideally 32-35°F)
2. On a plate with ice (some grocers recommend keeping fish on ice in fridge)
3. Original packaging until ready to cook
4. Lowest shelf (prevent drip)
5. Don't open packaging repeatedly
6. Use within 1-2 days of purchase

Repackaging fish:

If repackaging: - Vacuum-seal: extends to 7-10 days refrigerated - Use parchment paper OR plastic wrap + plate - Ice packs in cooler for transport home

Cooked fish:

1. Cool quickly: within 2 hours
2. Shallow containers for fast cooling
3. Airtight after cooling
4. Use within 3-4 days
5. Reheat to 145°F internal (or 165°F for safety)

Smoked fish:

1. Original packaging preferred (often vacuum-sealed)
2. Sealed tightly after opening
3. Use within 5-7 days of opening
4. Watch for slime + ammonia smell

Defrosting frozen fish:

• Refrigerator thaw: 24 hrs per 5 lb of fish (safest, slow)
• Cold-water thaw: 30 min per pound (in sealed bag)
• NEVER counter thaw (fish enters bacterial zone fast)
• Microwave thaw: acceptable but cook immediately after

Refreezing thawed fish:

USDA: safe to refreeze fish thawed in refrigerator (quality degrades). Not safe if thawed at room temperature or in microwave.

Vacuum-sealed fish:

• Pre-vacuum-sealed fresh: 7-10 days refrigerated
• Vacuum-sealed smoked: 2-3 weeks unopened, 3-4 days opened
• Vacuum-sealed frozen: maintains quality 12+ months
• Sous vide cooked + sealed: 5-7 days refrigerated

Shellfish-specific:

Live shellfish (oysters, mussels, clams): - 2-4 days refrigerated in original packaging - Tightly closed indicates alive; discard any open ones - Never freeze live shellfish - Cook the same day or next day for best quality

Cooked shellfish: - Cooked shrimp, lobster, crab: 3-4 days refrigerated - Cooked scallops: 3-4 days refrigerated - Frozen cooked shellfish: 3-6 months

Shrimp (raw): - Fresh raw shrimp: 1-2 days fridge - Frozen raw shrimp: 6 months - Pre-cooked frozen shrimp: 3-6 months

Scallops: - Fresh raw scallops: 1-2 days fridge - Frozen raw scallops: 6 months

Lobster: - Live lobster: 1-2 days fridge in original packaging - Cooked lobster: 3-4 days fridge - Frozen lobster tails: 6-9 months

Crab: - Live crab: 1-2 days fridge - Cooked crab meat (pasteurized): 3-5 days fridge - Frozen crab: 3-6 months

Octopus + squid: - Fresh raw: 1-2 days - Frozen: 2-3 months - Cooked: 3-4 days fridge

Cocktail/grocery store seafood: - Frozen cooked shrimp from bag: 3-4 days fridge once thawed - Smoked salmon retail (unopened): check date - Imitation crab (surimi): 7-10 days fridge unopened, 3 days opened

The 2-hour rule (extra critical for fish):

Fish at room temperature for more than 2 hours should be discarded. In hot weather (>90°F), reduce to 1 hour. Fish supports bacterial growth even faster than poultry above 40°F.

Don't: - Eat raw fish past 24-48 hours regardless of smell - Trust your nose alone — fish bacteria can be invisible - Refreeze fish thawed at room temperature - Eat smoked fish with off-smell (botulism risk in vacuum-sealed) - Leave fish at room temperature >2 hours - Mix raw fish with cooked foods (cross-contamination) - Use unstable refrigeration for raw fish

Common mistakes:

• Counter-defrosting: rapid bacterial growth + texture damage
• Storing in fridge door: temperature variation reduces life
• Trusting "freshness" by appearance only: fish bacteria can be invisible
• Stretching the 2-day rule: fish at day 3 raw is risky
• Not cooking thoroughly: smoked fish requires 165°F if heating

Cross-reference: see /pages/how-long-does/chicken-fridge for poultry comparison + /pages/how-long-does/beef-fridge for red meat + /pages/what-temperature-for/cooking-salmon for cooking temperatures.

Most published references (USDA FoodKeeper App, FDA Refrigerator + Freezer Storage Chart, USDA Food Safety + Inspection Service, NOAA Fisheries, StillTasty) converge on 1-2 days raw fish / 24 hours raw sushi-grade / 3-4 days cooked / 3-8 months frozen, with time-based discard rules essential due to silent bacterial growth.