1, introduced early in 1989 we began using underwater video monitoring fishway at the years of experience, we have designed specifically for counting fish in the fishway monitoring system can also be used with any water habitats. Underwater camera unit is self-cleaning design, suitable for long-term, permanent or semi-permanent installation in freshwater and marine environments. A typical hardware and software configurations, including 1-4 water downstream media video camera / sensor assembly systems. Since 2005 our fish underwater monitoring system has been widely used to study fish migration patterns, habitat use and migration time interannual changes. Fish count up to 95% accuracy, identifying the type and size of the classification accuracy of 90%. 2, the main features of? Self-cleaning underwater camera system? 30 meters waterproof? 580 line color high definition camera (1/3 SONY Super HAD CCD sensor) and nighttime infrared illumination (48 infrared light emitting diodes)? Biological data filtering algorithm, analysis and live streaming? If our customer requirements, all video and sensor data will continue to upload all live to the Internet, we conducted a secondary analysis of a central computer, including species identification, fish populations, the number of estimated behavior trend analysis, ecological relationships between annual spawning significant ecological activities? The system can detect PIT tag (optional)? save water and air temperature every 30 seconds, and continue to be uploaded to a dedicated website? Low maintenance, with a Self-cleaning glass lenses? The system can also be powered by solar cells powered by batteries. ? The system is customized to adjust according to the application environment (fishway, dams, etc.). 3, hardware imaging unit 3.2 3.1 3.3 solar control unit and battery powered 4 software to identify fish species, number and measure the abundance of fish, and video and data feedback to our customers.