FISH PROCESSING METHOD AND BLOOD-REMOVAL INJECTION NOZZLE USED THEREFOR

To provide a fish processing method for preserving a fish for a further long period and consequently, remarkably increasing Umami ingredients of the fish, and blood-removal injection nozzle for the fish processing method.SOLUTION: A fish processing method includes: a head cutoff step of cutting off the head of a fish 1 at a head cutting surface 14; and a first blood removal step of press-injecting water in a fish body from the head cutting surface 14 via the kidney 6 and discharging the blood of the fish 1 outside the fish body to remove the blood. Specifically, a tip end portion 17c of a blood-removal injection nozzle 17 connected to a hose 18 via an operation part 19 is inserted into the kidney 6 exposed onto the head cutting surface 14, and water is press-injected therein to remove the blood. The tip end portion 17c has a cross groove 17d...