Accurate fishery organism detecting, counting and grading device

An accurate fishery organism detecting, counting and grading device comprises a fishery organism input system, a detecting system, a grading system and a control system. According to the fishery organism input system, fishery organisms are controlled to enter the system one by one in the long-axis direction of the bodies of the fishery organisms by adjusting the sizes of a lining screen and a lining gasket. The detecting system is used for detecting the body length of each fishery organism. The grading system is used for judging the size of each fishery organism according to the corresponding body length so as to conduct grading and conveying the fishery organisms to a specific position. The control system is used for coordinating and controlling the operation of the whole device. By the adoption of the device, number counting, body length detection and size grading of various fishery organisms can be achieved at the same time easily and efficiently, and extra injuries to fishery organisms are avoided. The device can be widely applied to various links of fishery production including fry incubation, culture production and marketing, the efficiency and benefits of fishery production can be improved, and application and marketing prospects are broad.