Certification & Core Plus Development Guides. The Guides were initially implemented on October 1, 2007. While changes to the certification standards are normally implemented on October 1, of any given year, other aspects of the guide, in particular the Core Plus component may be modified throughout the year.
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.
How long does raw catfish last after being frozen and thawed? Catfish that has been defrosted in the fridge can be kept for an additional 1 to 2 days in the refrigerator before cooking; catfish that was thawed in the microwave or in cold water should be cooked immediately.