The Ultimate Guide to Keep Tuna Fresh and Safe
Tuna is a popular and nutrient-rich fish that’s perfect for grilling, sushi, or canned convenience. However, improper storage can lead to spoilage and foodborne illness. Knowing how long tuna lasts—and the best ways to store it—ensures you enjoy its fresh flavor while keeping your meals safe.
Shelf Life of Tuna
At Room Temperature (Raw or Cooked):
- Raw Tuna (steaks or fillets): 1-2 hours (discard if left out longer)
- Cooked Tuna: 2 hours (1 hour if above 90°F/32°C)
- Canned Tuna (unopened): 3-5 years (check expiration date)
- Canned Tuna (opened): 1-2 hours
In the Refrigerator:
- Raw Tuna (whole or fillets): 1-2 days
- Cooked Tuna: 3-4 days
- Sushi-Grade Tuna: 1 day (consume immediately for best quality)
- Canned Tuna (opened): 3-4 days (in an airtight container)
In the Freezer:
- Raw Tuna (steaks or fillets): 6-8 months
- Cooked Tuna: 2-3 months
- Sushi-Grade Tuna (frozen): 2-3 months
Best Practices for Storing Tuna
- Refrigerate Immediately – Store raw or cooked tuna in the coldest part of the refrigerator at 32°F to 38°F (0°C to 3°C).
- Freeze for Long-Term Storage – Wrap tuna in plastic wrap, freezer paper, or vacuum-sealed bags to prevent freezer burn and preserve freshness.
- Use Airtight Containers – Store cooked or opened canned tuna in airtight containers to lock in flavor and prevent contamination.
- Label and Date – Mark the storage date to ensure you use the tuna within the recommended time frame.
- Thaw Safely – Thaw frozen tuna in the refrigerator overnight or under cold water. Avoid thawing at room temperature.
Signs Tuna Is Going Bad
- Slimy or Sticky Texture – A slimy or tacky surface indicates spoilage.
- Strong, Fishy Odor – Fresh tuna has a mild, clean ocean scent. A sour or ammonia-like smell suggests the tuna has gone bad.
- Discoloration – Raw tuna should have a deep red or pink color. Brown or gray spots are signs of aging and spoilage.
- Cloudy Eyes (for whole tuna) – Bright, clear eyes indicate freshness. Cloudy or sunken eyes suggest the fish is past its prime.
How to Use Tuna Before It Spoils
- Grilled Tuna Steaks
- Tuna Tartare or Sushi
- Seared Tuna with Sesame Crust
- Tuna Pasta Salad
- Tuna Casserole or Sandwiches
By storing tuna properly, you can extend its shelf life, reduce food waste, and ensure your meals are both delicious and safe. Whether you’re enjoying a fresh tuna steak or opening a can for quick meals, these tips will keep your tuna fresh and ready to cook.