First of all, you could probably just take it back to the pet store. If you really need to kill it, the most humane way is to add some clove oil to the water. It will kill the fish quickly and painlessly.
To dispose of a dead goldfish, wrap it in a paper towel and place it in the trash. Do not flush it down the toilet or bury it in the garden.
You simply flush it down the toilet! That's all there is to it!
To properly dispose of a dead goldfish, you can wrap it in a paper towel and place it in the trash. Alternatively, you can bury it in your backyard or flush it down the toilet. Just make sure to handle it respectfully and consider the environmental impact of your chosen method.
Dispose of it.
Because your goldfish is dead.
I'm sorry, but your goldfish is dead....
Bury them
dead pond fish
Its dead
if it is not swimming and it lays on its side then it is dead.
If it does that it's dead
Its DEAD