When you are unable to eat your fish right away, the best option you have is to freeze it and eat it later. Freezing fish can make sure that you preserve the fish for later use. You do want to be wary of the way you freeze your fish as it can go bad in the freezer without proper care.
The first thing you need to remember is that every fish you catch needs to be kept alive, chilled, or put on ice after it is caught until you get it home to prepare it. The next thing you need to do is to clean it as soon as possible to keep its flavor. As a side note, a whole fish can be kept for up to one day as long as it is chilled or on ice. After you clean, fillet, and steak the fish the way you want it there are several ways to refrigerate and freeze it.
Freezing Fish Guidelines
Prepare Your Fish
Wash fish and remove scales – remove the scales by gently scraping from tail to head using a dull knife or filleting knife.
Remove entrails – cut the length of the belly from vent to head to remove the insides. Cut just above the collarbone to remove the head, and use the edge of your cutting board or table to break the backbone.
Remove the dorsal fin – slice the flesh along each side of the fin and pull out. Avoid using a knife of scissors to trim the fins as it will leave bones at the base of the fin.
Wash the fish thoroughly with cold running water.
Appropriately dress the fish – cut large fish into steaks or fillets. Cut down the back of the fish from tail to head, then cut with your knife flat against the backbone to the tail to cut fillets.
Pretreat Your Fish Steaks or Fillets
Be sure to pretreat your fish to improve the quality of your frozen fish. There are two types of fish – fat or lean. This is determined by the amount of fat in their flesh.
Fat fish: Dip fat fish into an ascorbic acid solution (2 tablespoons crystalline ascorbic acid to 1 quart cold water) for 20 seconds to control flavor change.
Lean fish: Dip lean fish into a brine (1/4 cup salt to 1 quart cold water) for 20 seconds to avoid drip loss during the thawing process, this process will also firm your fish.
Package Your Fish
Choose one of your favorite methods to package your fish for later. If you plan to use your fish within a day, store them in the refrigerator. However, if you plan on using them at a later date, freezing your fish will keep them fresh. Remember to place freezer paper in between the fillets or steaks to prevent them from freezing together.