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Less than a foot
The brim fish, also called bluegill, bream, and pond perch, usually lives 4 (four) to 6 (six) years.
I assume you mean thawed - unthawed is refrozen! As long as that was the only time they have been frozen, they will be perfectly good. Most shell food and fish is perfectly good after being frozen, but beware, many supermarket fish/shellfish, have been frozen before being defrosted and put on display. Check the label to be sure.
3 million years
It does not have to be, but often is to preserve the fresh flavors of the fish while it is being transported long distances.
It last pretty long. You can still cook it.
I think you mean how long is turkey bacon good for if frozen, and that depends on the brand of turkey bacon.
20 inches long
Fish does not last long in the refrigerator. Depending upon the type of fish and assuming it was fresh when frozen, thawed fish could keep up to 5 days refrigerated. But it would be best to use the fish as soon as it is thawed. See Related Links. You can also cook fish from frozen.
Gain heat
It likely is not good anymore. Even frozen, the fats can become rancid.
About three days