"Naturalists have assured us the fishfolk do not feel pain, so don't worry about it."
A raw fishperson steak comes from Butchering a fishman corpse by creating a job on it. Each corpse becomes two raw fishperson steaks.
It can be be cooked in a Kitchen to become a Bushel of Sausages, Fishperson Steak and other dishes.
Raw Fishperson Steak lying on the ground next to some gibs