Fish cleaner is the skill associated with the fish cleaning labor. Fish cleaners process raw fish at the fishery.
Fish cleaner skill level is used to determine the speed at which the labor is completed. Fish cleaners can produce food and craft material for a fortress as part of the fishing industry.
It is commonly advised to assign fishing and fish cleaning tasks to different dwarves: when one dwarf is fishing, another one is busy preparing the fish. One or two fish cleaners are sufficient for a fortress located near a brook.