Acceptable Methods of Euthanasia.
When considering euthanasia bear in mind that fish are capable of experiencing pain and stress and must therefore be destroyed humanely. There are a few acceptable methods and we will run through them one at a time.
1. Anaesthetic- Immersion in an anaesthetic solution such as Benzocaine or Tricaine Methane-Sulphonate is acceptable and may only be available via your veterinary practice. The effective dose will depend to some extent on the species of fish. An exposure to 300mg per litre of Tricaine Methanesulphonate is sufficient to cause the death to most aquarium fish. It is however advisable to leave the fish in the solution for at least an hour after death to prevent any possible recovery by the fish.
2. Decapitation- In many cases, especially with tropical fish this method is quick, clean and easy.
With the aid of a scalpel, or a sharp knife or even a pair of very sharp scissors this job can be carried out with ease. Lay the fish on a flat surface, prevent it from escaping and with one quick motion, slice its head from its body. The body may still wriggle; this is acceptable, as it is just a nerve reaction. The brain will feel no pain. To prevent HYPOXIA, you must destroy the brain as soon as the fish has been decapitated. Simply simply holding the head and penetrating the brain with a sharp instrument does this. This may sound barbaric, but it is humane.
Concussion- This is a method that is preferred by a lot of aquarist. What you do is wrap the fish’s body in a cloth, leaving the head exposed. Picking the body of the fish you then strike the head off the edge of something hard with a hefty blow. This renders the fish unconscious and then again you must either decapitate it or destroy it’s brain to avoid any chance of recovery. Anglers’ use a club, known as a priest to club big fish such as trout, to render it unconscious. I would not advise that you use such a device with tropical fish.
Dragonslair,