how long can fresh fish be kept in refrigerator
David Sacks/Lifesize/Getty Images. Time. Fresh fish will only last in the refrigerator for one or two days, and shellfish will last up to three days. For longer periods of storage, you must freeze the fish or it will spoil.However, do not refreeze the fish once you have thawed it.Hemera Technologies/Photos.com/Getty Images.resh fish will only last in the refrigerator for one or two days, and shellfish will last up to three days. For longer periods of storage, you must freeze the fish or it will spoil. However, do not refreeze the fish once you have thawed it. Hemera Technologies/Photos.com/Getty Images.