How do pectoral fins help tetraodontiform fishes control their movements?

In tetraodontiform fishes, the pectoral fins are located just behind the gills and remain in an almost constant state of rapid vibration. This specialized movement provides these fishes with a level of delicacy and precision in controlling their maneuvers that is considered unusual even among other fish species.1

While most tetraodontiforms rely on the undulation or sculling of their dorsal and anal fins for general locomotion, and reserve their caudal fins for sudden bursts of speed, the pectoral fins serve as the primary mechanism for fine-tuned directional control and stability.1