The aim of this project was to design and develop a remote monitoring system for an open water aquaculture fish cage . However, it is difficult to observe fish activity and the state of the net cage with the naked eye due to the deep, murky sea water .Aquaculture keepers, therefore, need a way to remotely observe fish activity and the state of the net cage on a regular basis without having to visit the cages themselves and give an alarm signal when the fish are reared. in the mesh cages they escape. Video and sonar systems were selected to view the fish in the cage, and a radio telemetry system was tested on the cage's power buoy. The imaging capabilities of the optical and acoustic systems and the data transfer capabilities of the telemetry system were tested. The monitor consists of three functional parts: a scanning sonar system located in the center of the offshore network cage, a control and data processing display system located on the ground base station, a wireless data communication system. The results show that the system has good performance in monitoring fish activity, distribution and the state of the mesh cages in different environmental conditions.The optical system is aimed at the visual inspection of the tanks by means of a camera system and a monitoring system. video capture.

The optical system consists of:
• N ° 1 underwater video camera
• N ° 1 underwater video camera with Light Ring
• N ° 1 Video Encoder
• N ° 1 Camera Station
• Wiring, components and accessories required for system operation.

The cameras will be installed outside the cage and anchored with special hooks on the cables that hold the net, their arrangement is designed in such a way as to be able to give the simultaneous vision of two points, one at about 6m depth or at half height of the cage and another on the bottom of the cage in the center, with the camera facing up. The camera mounted on the bottom will guarantee us a good view on days of low external light or in case of algae formation inside the cage. To partially compensate for brightness issues, the camera installed at the bottom has around 24 bright LEDs on the front.
The arrangement of the cameras is carried out as in the diagram shown in the following figure:
The Video Encoder is a video encoder (also called a video server) that can convert analog video signals into digital format and transmit them to other devices over an IP network. This system made it possible to convert an analog video system into a network video system so that users could view live images via a web browser or using video management software on a networked computer. This server allows users in remote locations to simultaneously access images from the same analog camera or network cameras, if installed.

The Camera Station is a complete system that allows you to monitor and record images for up to 100 cameras. Installed on a standard PC, it is ideal for retail outlets, hotels and schools. In addition to being simple to install and configure, it also includes automatic camera detection, a unique setup wizard and efficient management of Axis network video products in the system.

The monitoring system ,, consists of the following subsystems:
• N ° 4 transceiver units (transceiver unit)
• N ° 4 Transducers
• N.1 Ethernet Switch
• N.1 Computer with monitor
• N.1 Echoview - Sonar5 processing software