I feel bad to cut the fish or use force on it while it's still alive. It just feels mean and torturous . I just wait for it to pass away
Sorry, that's actually funny in a sad way.....
Growing up on a farm our main focus was on how to ensure that the animal we butchered would be the best quality it could be when it reached our table. This included knowing how to kill and bleed the animal. This is the same attitude that slaughter houses have when they prepare the pork, chicken and beef that you eat.
If you want the best quality salmon for your table use the advice that different people have provided. If you're not prepared to do that, you'll be eating an inferior product, and that's seems like such a waste.
You are probably better off buying your salmon from a commercial fisherman who has done your killing and bleeding for you...