Question: Knock out a fish before cleaning.
Options:
Hit it with the sharp edge of your knife by the dorsal surface of the fish to either knock it unconscious or kill it.
Hit it with your hand or on a rock by the dorsal surface of the fish to either knock it unconscious or kill it.
Answer: Hit it with your hand or on a rock by the dorsal surface of the fish to either knock it unconscious or kill it.