Can dead rock come back alive?

[glennf]

I am curious if anyone had dead corals and liverocks out of the water for a few months and placed back into the tank come back alive?

Can corals survice this ordeal?

A had a assumed dead goniopora "rock" reused from a heap in the garden and used it as a pedastal for my duncanopsammia.

After a few days it turned out a surprise.
This was september 8, 2020

 

[lapin]

I have had them come back after being "dead" a year, but they were still in the tank

 

[Reefahholic]

That’s crazy!