The invention relates to a fish sorting device, comprising a weighing compartment which is designed to receive a single fish, a weighing device which is coupled mechanically to the weighing compartment and is designed to sense the weight exerted on the weighing compartment by the fish. The invention is characterized by at least two discharge ports through which a fish can be removed from the fish sorting device, a sorter which is designed to sort the fish from the weighing compartment selectively into one of the at least two discharge ports, an actuator unit (73,74) which is coupled mechanically to the sorter and actuates a movable sorting element (13,14) of the sorter in order to sort the fish into one of the discharge ports, and a control unit which is in signal communication with the weighing device and the actuator unit and is designed to compare a weight determined by the weighing device with at least one limit weight, and activate the actuator unit, depending on the comparison between the determined weight and the limit weight, in such a way that, when the limit weight is exceeded, the fish is sorted into a first discharge port and, when the weight falls short of the limit weight, the fish is sorted into a second discharge port different from the first.
