Abstract: A scale on a surface of a fish body is vertically or generally vertically raised by the injection of a water from a first water injection nozzle row. The raised scale is removed from the fish body by a spray of water from an adjacent water injection nozzle row. A water pressure adjustment section is used to apply a uniform water pressure to the surface of the fish body in spite of variation in the surface of the fish body to be scaled.

Abstract: A food washing apparatus comprising a means for generating a sheet-like water jet stream that impinges against foods such as marine products including edible jellyfish, seaweed, shucked or shell-covered shellfish and the like, farm products including vegetables, fruits, and the like by conveying the foods through a water jet stream distribution area or food wash area. A plurality of sheet-like water jet stream layers are generated at a predetermined angle from various directions and impinge against the food surfaces so as to wash them and remove foreign matter such as insects, mud, pebbles, fish scales, etc. from the foods.