It's a miracle, fish lives!

So about 10 days ago I'm pulling out a couple of pieces of live rock to track down Mantis shrimp #5. I put one piece of rock in a plastic bag just to get it out of the way, left it in there for maybe 60 to 90 minutes, I go to add it back to the tank and there in the bottom of the bag is my algae blenny laying in barely 1/2 in of water but still alive! I put him back in the tank and he hid for a couple of days. Now I notice he does not eat even half as much as he used to and I think he's looking a little skinny. Is it possible he suffered from this accident? Do you think he may die?

Thanks
Onjinsan

 

He could just be re acclimating due to the stress. Just give it some time - if its eating it will probably be OK

 

I would try light targeted feeding of food fortified with garlic. Garlic works wonders on fish immune systems.