The underwater robot is an entertainment type, so the shape is more fluid, covered, and the structure used is a more lightweight "2 1" power structure. Mainly using bionic design, the overall feeling is a flexible small shark. The structure of the mechanical claw is hidden in it. The mechanical claw is unfolded through the folding structure. The mechanical arm can be folded according to whether it is used or not. There is a small suction turbine on the top of the mechanical claw, which is assisted by its suction function when grasping, Make the object easier to be grasped.