if it is a tropical fish, the best and quickest thing to do is drop the fish in a jug of water then put in the freezer, the fish feels no pain and goes to sleep.(doesn't wake up)
J4MES

why not get a tank divider and add some melafix to the side with the zebra danio?
im planning to use the tank when these come out of there for breeding
I think with some simple meds and tlc the fish could live. Just take a divider, like a previous poster said, and you could cure him, many people have bought rescues with tails ripped off, and many have survived.if it is a tropical fish, the best and quickest thing to do is drop the fish in a jug of water then put in the freezer, the fish feels no pain and goes to sleep.(doesn't wake up)
J4MES
Not trying to be rude but why couldn't you have put the fish in a bag and bashed it against a wall.Arn't fish heads toughi think clove oil is the only humane way to kill a small fish.
ive recently had to chop the head of 2 of my convicts (too big to do it any other way) and its really not nice!!
i dont get how people think putting a warm blooded fish in cold water and letting it freeze will be painless tho......![]()