if you go fishing and a fish swallows the hook, you can stick pliers down its throat and yank the hook out and most of the time the fish is okay...
No they're not.
Yes, they'll swim away, but that's because they're scared and have built-up adrenaline. They might live for a few hours or a day, but they'll die. Unless you know how to do it correctly. "Yanking" will
always kill the fish.
I don't think this is that case here tho if only going on the mouth alone.
This fish you have will die tho,imo. He has no suction to swallow food. ( Is the pic you've shown how his mouth is all the time? I'm taking it as it is until you say otherwise.)
With his mouth hurting like it is, he probably has no intention of eating either. Just remember that fish can live a month or 2 w/o eating if they are healthy and not stressed. If it doesn't get better in a few days and he won't eat, I would try to do something.
If you mess with their gills or innards, they will die. What did you use and how did you do it?
I have 30 years experience of taking hooks out of fish, ever since I was 7.
I fish 5 days a week in that time. And countless bass tournaments. I will try to help as much as possible if I can.
Please give us all the info you can so everyone here can try to help.
There's a LOT of people here that know more already than anyone I've ever seen.