How To Mercifully Kill A Fish. That way they wont suffer at all and they will stay, for the most part, fresh throughout the day. The next step is to use the blunt object to knock out the fish.
Even fish should be killed humanely. For cats, 1 teaspoon can be fatal. While the boiling water, rather than the freezer, will kill it almost instantly, the cold will immobilize the lobster so it won't thrash about.