Want to call me an *** that's fine. But none of you answered my question - how do you know the fish wants to die? The answer, you DONT. So what gives you the right to play god and kill the fish?
I agree if the fish is truly suffering in torture it is more humane to euthanize, there are cases where after a fight the fish is ripped open/missing tails etc. But that's not the case here or in many past threads. The only thing i will take back is i didnt mean to dump it all on the OP, but more angry on the accepted general belief on this forum.
Everytime someone asks that their fish looks to be suffering, instead of asking hard questions to determine if the fish really should be killed, you have all those fish "experts" tripping over each other offering METHODS to kill the fish, without even considering if the fish deserved to die. This is one example, the OP said themselves the fish is wasting away for MONTHS, and probably will live for months too if not longer, so what gives you the right to take that away from the fish.
Again i am no peta and it's fine if you want to kill off the fish because it's weak, old, sad, not active, making the tank look bad, it's only fish after all and we have done much worse to tens of thousands of fish daily.
But dont pretend you are doing the fish a favor by killing it, because you are not. I would make the analogy to old people, but i think it's an obvious one so i will get off my soapbox now.
stay classy....