Depending on the fish, they may survive being frozen, and revive upon thawing.
That happened to my mother in law!
A catfish came back alive after being frozen in the freezer for six months!
She froze the fish in a large pan of water and placed it in the freezer whole!.................
“Depending on the fish, they may survive being frozen, and revive upon thawing.”
I doubt it. The title of the thread reads they froze dead fish, which suggests they got the fish probably from a fish market where they could have been dead for days. I don’t think they can be revived.
They were dead before being frozen into the ice, so no that will not happen.
I lived in Minnesota by Bassett creek (Golden Valley by Minneapolis). One year many minnows were frozen in the ice. I tried to thaw them out to revive them. It did not work : )