You will find that most times in life you actually do know, if you're willing to put in the work necessary to find out. In this particular case I assure you that I have put in that work.It still may be possible. You never know...
Still, I have had fish laying on the ice for hours, stiff as a board, exposed to the dry cold air and they still started swimming after sitting in a tub of water. Were they frozen solid? Well they were frozen enough that they were stiff as heck. They most surely suffered tissue damage and would not have fully recovered yet they did still thaw out and swim around. That much I do know.