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.
All you need to know about defrosting frozen fish. Defrosting frozen fish should be carried out overnight in the refrigerator. Do not thaw frozen fish at room temperature as this encourages bacteria growth. And, once defrosted, the fish should be eaten within 48 hours.