The mermaid refers to a mysterious aquatic animal with a human fish tail. It mostly lives in the waters of the ocean; its image is often used in fairy tales, myths, ghosts, fantasy novels or ancient legends, and historical records. This expression can not only be used to specifically refer to the waist as the boundary, the upper body is the image of a beautiful woman, and the lower body is a mermaid with a beautiful fishtail with scales, but also can be used to express a beautiful and beautiful woman.