An information processing method executed by a computer, the information processing method including: an obtainment step of obtaining values of individual predatory behavior parameters indicating features of predatory behavior for feed by an individual fish, values of small fish group predatory behavior parameters indicating features of predatory behavior for feed by the individual fish belonging to a small fish group including a small number of the individual fish, and values of feeding parameters indicating features of a feeding method for a large fish group including a large number of the individual fish, the large number being larger than the small number; and a simulation step of performing, on the basis of the values of the individual predatory behavior parameters, the values of the small fish group predatory behavior parameters, and the values of the feeding parameters that have been obtained by the obtainment step, a simulation of growth of each of the individual fish belonging to the large fish group fed by a feeding method corresponding to the values of the feeding parameters, wherein the information processing method further includes: a generation step of generating, on the basis of the values of the individual predatory behavior parameters and the small fish group predatory behavior parameters obtained by the obtainment step, a group feeding simulation image of the large fish group being fed, correcting values of large fish group predatory behavior parameters indicating features of predatory behavior for the feed by the individual fish belonging to the large fish group until a difference satisfies a preset condition, the difference being between the generated group feeding simulation image and a captured image having, captured therein, the large fish group being fed, and obtaining values of the large fish group predatory behavior parameters, the values having been corrected until the condition has been satisfied, wherein in the simulation step, a simulation of growth of the individual fish belonging to the large fish group fed by a feeding method corresponding to the values of the feeding parameters is performed on the basis of the values of the large fish group predatory behavior parameters obtained by the generation step and the values of the feeding parameters. an obtainment step of obtaining values of individual predatory behavior parameters indicating features of predatory behavior for feed by an individual fish, values of small fish group predatory behavior parameters indicating features of predatory behavior for feed by the individual fish belonging to a small fish group including a small number of the individual fish, and values of feeding parameters indicating features of a feeding method for a large fish group including a large number of the individual fish, the large number being larger than the small number; and a simulation step of performing, on the basis of the values of the individual predatory behavior parameters, the values of the small fish group predatory behavior parameters, and the values of the feeding parameters that have been obtained by the obtainment step, a simulation of growth of each of the individual fish belonging to the large fish group fed by a feeding method corresponding to the values of the feeding parameters, wherein the information processing method further includes: a generation step of generating, on the basis of the values of the individual predatory behavior parameters and the small fish group predatory behavior parameters obtained by the obtainment step, a group feeding simulation image of the large fish group being fed, correcting values of large fish group predatory behavior parameters indicating features of predatory behavior for the feed by the individual fish belonging to the large fish group until a difference satisfies a preset condition, the difference being between the generated group feeding simulation image and a captured image having, captured therein, the large fish group being fed, and obtaining values of the large fish group predatory behavior parameters, the values having been corrected until the condition has been satisfied, wherein in the simulation step, a simulation of growth of the individual fish belonging to the large fish group fed by a feeding method corresponding to the values of the feeding parameters is performed on the basis of the values of the large fish group predatory behavior parameters obtained by the generation step and the values of the feeding parameters. a generation step of generating, on the basis of the values of the individual predatory behavior parameters and the small fish group predatory behavior parameters obtained by the obtainment step, a group feeding simulation image of the large fish group being fed, correcting values of large fish group predatory behavior parameters indicating features of predatory behavior for the feed by the individual fish belonging to the large fish group until a difference satisfies a preset condition, the difference being between the generated group feeding simulation image and a captured image having, captured therein, the large fish group being fed, and obtaining values of the large fish group predatory behavior parameters, the values having been corrected until the condition has been satisfied, wherein in the simulation step, a simulation of growth of the individual fish belonging to the large fish group fed by a feeding method corresponding to the values of the feeding parameters is performed on the basis of the values of the large fish group predatory behavior parameters obtained by the generation step and the values of the feeding parameters.