On the other hand, the lower pair of eyes is positioned below the waterline, allowing the four-eyed fish to see underwater. Remarkably, these lower eyes are equipped to perceive ultraviolet light, giving them an advantage in distinguishing objects under the water. This ability to see both infrared and ultraviolet light spectrum enhances the fish's hunting and predator-avoidance capabilities, enabling it to sense subtle movements, prey, and potential threats in their environment.