Is pickled herring safe if it was not opened but not refridgerated?

Pickled herring that has not been opened but has not been refrigerated may still be safe to eat for a limited time, depending on the storage conditions and the type of pickling process used. If it has been stored in a cool, dark place and the use-by date has not passed, it may be acceptable. However, it's crucial to check for any signs of spoilage, such as off smells or unusual textures, before consuming. When in doubt, it's best to err on the side of caution and discard it.