The single-joint robotic fish mimics the tail fin swing pattern of real fish in nature. Each of its components adopts a modular design and has a waterproof function. The movement modes include free swimming based on bionic tail fin propulsion and APP wireless remote motion based on WiFi network.

By adjusting its center of gravity structure, it can dive to a certain depth of the water surface. This type of robotic fish can be used for underwater observation, and it can also carry various sensors for environmental monitoring operations, such as water quality inspection and inspection along the line. In addition, The man-machine interface of single-joint robotic fish is very friendly and suitable for elementary and middle school students to carry out popular science education of intelligent bionic robots.