Pacu's have a very powerful bite and crush hard shelled nuts that fall into the water in the wild very few fish can survive repeted bites from a pacu. Sorry.
oh no wonder..
I learned by the news they got human teeth and will bite your testicles. Search it and read it's true.
And I remember my old Trimac I gave to my old roommate. He ripped both the Oscar's bottom and top lips off. And I witness the mouth grew back to normal with new lips in about a month to full recovery.
And I can't view your video but from hearing words of others, get a big heavy blade n chop his head off real hard one chop to set the poor thing free..
My best and favorit would be explosion. There is no time or pain to suffer from. It's like a light switch. Off or on. No time at all in between.
Freezing is stupid, long, and cruel. If it's so painless or harmless, why does it lead to death?
How anyone gonna know the feeling of what fish if it can't tell you?
Same thing as saying You can get stabbed slowly to death, or slowly burn to death in a room and I says it's the most painless way. So dumb it makes me mad. I dont care what dumb research says so.