I'm a Mur-diddily-urderler

I did the most stupid thing today.
The water in the fish tank was a little murky.
I decided to change it.
I had to transfer the fish - 7 in all - to a pail before I could start.
I filled the pail with water and placed the fish in the pail.
I proceeded to scoop the murky water out from the tank.
I was half way through when I was stopped in my tracks.
4 fish went belly-up in the pail.
I frantically tried to decipher what was going on.
It was only then did I realize that the pail felt a little warm.
I placed the fishes in a pail of warm water! Oh My God!
I am a Murderer,
a Serial Killer of goldfish.
So I quickly placed the fish in another pail of cool water, and turned the oxygen on, hoping that they will survive the ordeal.
3 did not make it.
I believe the other 4 is a traumatized cos they are a little less active now.
Stupid me.
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This event really reminded me of a Simpsons episode where Homer had a pet lobster, I believe pinchy was the lobster's name. Anyway, one fine day, Homer thought pinchy was a little dirty and gave pinchy a hot bath., unfortunately, the bath became too hot. He ended up eating his lobster friend but he wailed with every bite.
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No, I did not proceed to eat my goldfish. I don't think I'll ever live this down.