There are several types of mackerel fish, such as Atlantic, Blue, Chub and King. Mackerel features oily meat that spoils quickly, so you must store the fresh fish immediately. According to the University of Minnesota, fish is the most susceptible to microbial spoilage of all flesh foods and must be frozen under the proper conditions. Since mackerel are small fish, you can freeze them whole. To avoid the risk of foodborne illness, always thaw frozen fish in a refrigerator.
Remove the guts of self-caught mackerel before freezing it; store-bought fish can be frozen as is. Freeze fresh mackerel within 24 hours of purchase or capture.
Transfer the mackerel into a rigid plastic storage container.
Place heavy-duty foil, plastic wrap or freezer paper in between each layer of fish so they will separate more easily after thawing.
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Press an airtight lid onto the storage container to keep out moisture and prevent freezer burn. Label the container with the storage date.
Store the mackerel in a freezer set at 0 degrees Fahrenheit or below for two to three months.
Elizabeth Arnold has written for a wide variety of publications and websites. Her experience includes writing travel features for "Recommend" magazine and packaging marketing copy for both Metro-Goldwyn-Mayer and Warner Bros. consumer products. Recently, Arnold was a staff writer for "Special Events" magazine. Arnold studied English at the University of Wisconsin-Milwaukee.