Abstract: A method and apparatus for sorting fish comprising receiving the image of a fish in a video camera and storing it in an image plane memory. The boundary values of the image are determined, as well as the areas, length and width of the image. Ratios of predetermined ones of the areas, length and/or width, are determined, and the specie of the fish is indicated from predetermined ratios of those areas.

Abstract: Fish sorting apparatus comprises a lighted viewing conveyor belt arranged to receive fish seriatim and a video camera mounted above the viewing belt and directed downwardly for receiving images of fish on the belt. A second, sorting, conveyor belt is arranged to receive fish from the viewing belt, and a divider wall above the sorting conveyor belt, which extends parallel to the sorting conveyor belt axis, divides a rear exit portion thereof into separate channels. A movable deflector is mounted in front of the divider wall for deflecting fish on the sorting conveyor belt into one of the channels, this deflector being moved in response to signals from an electronic circuit connected to the video camera so that the fish are deflected into one or other of the channels according to the image received on the video camera.