Quickest way to humanely kill a small fish ?

Fish are like worms. If you cut its head off it will just grow new legs. Just give it some bad news and leave sharp objects around the tank. it will soon take care of itself and your hands are clean....
 
blended fish video

Nobody would want to drink that surely :eek::o. Cat would love that though :D

Head off with a knife sounds reasonable, essentially the way humans have been executed in the past (guillotine or axe), since you can't exactly hang it ;)
 
FishKeeping said:
There comes a time in every aquarist's life when a fish that can no longer recover from disease or injury must be euthanized. This is no easy task but it can be done humanely and peacefully without stress to fish or aquarist.

The best method is a two-step process. First, anesthetize the fish with clove oil so that it is sleeping and unable to feel pain; then introduce a clear grain alcohol like vodka to ensure the fish will not wake up.

This method is commonly misrepresented as mixing clove oil and vodka together. That is incorrect. Clove oil must be introduced first, allowing the fish to fall asleep before introducing vodka. Vodka will be stressful for a fish that is not anesthetized.

Clove oil (eugenol) is available at any drug store and is sold as a toothache remedy. It has been used for years as a fish anesthetic for surgeries and tagging procedures. Clove oil will put a fish to sleep and ensure it feels no pain. However the fish can wake up from this sleep if removed from the clove bath. The last step of adding the vodka will ensure the fish expires.

Here are the steps for fish up to 3" (7.6cm) in length:

1. Add tank water to a measuring cup or mixing bowl. Measure the amount of tank water you add to the cup or bowl and make a note of it. Place the fish in the container. If the fish is in a clear cup place a dark towel around the cup to calm the fish.

2. Fill a small, clean jar or bottle with tank water, leaving some room at the top. This might be a baby food jar or pill bottle. Put 1 drop of clove oil in the jar or bottle, cap and shake vigorously. The clove oil must emulsify, turning the water milky white.

Gently pour about 1/4 of this emulsified mixture into the fish's container. The fish will begin listing as it starts to fall asleep. Let the fish be for about 10 minutes. The fish should be resting on the bottom by then. It will look dead, but if you watch closely its gills will be breathing once every few seconds. If after 10 minutes the fish is still rising off the bottom swimming intermittently, retrieve the jar or bottle of emulsified clove oil, re-shake, and add the same dose to the fish's container. Wait again.

3. Once the fish is asleep on the bottom, add 20-25% white grain alcohol. For example, if the fish is in 8oz (240ml) of water, add 2oz (60ml) of vodka. Let the fish stay there for at least 20 minutes.

4. Check the fish carefully after 20 minutes for any gill movement. If there is no gill movement over a 60 second period, the fish has expired.

:).
 
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