How does the zigzag dance of a male stickleback relate to courtship?

The zigzag dance of the male stickleback is a highly ritualized reproductive behaviour that serves as a critical component of its courtship process. During the breeding season, the male constructs a nest and uses this specific, exaggerated movement pattern to communicate with and entice a female to enter the nest to lay her eggs.2

In the context of courtship, such displays function as a communication system that helps reduce hostility and facilitate reproductive success. By performing the zigzag dance, the male signals his readiness to mate and guides the female toward the nest he has prepared. This ritualized interaction is essential for species recognition and helps ensure that the pair successfully proceeds to the consummatory act of fertilization, after which the male takes on the role of guarding and aerating the eggs.12