Imitation crab sold in loose form in trays in fish cases will keep in the refrigerator three to five days. When frozen, they should be used within six months. Signs of spoiled imitation crab are similar to those of fish, Kishimoto said--foul fishy smell, slimy surface and sour taste.

Is it OK to eat expired imitation crab?

Please consume your Louis Kemp surimi, imitation crab, or imitation lobster before the “use-by” date printed on the package. The use-by date is valid as long as the product is in its original packaging and unopened. Product that is past date should be discarded. Once opened, the product should be enjoyed within 3 days.

How long is imitation crab good for after use-by date?

The shelf life of imitation crab varies depending on packaging and storage. Unopened vacuum sealed packages are typically good in the fridge for two months or the "use by" date. Once opened, use within 3 days.