Why is the eye of the parrot fish is considered an organ?

The eye of the parrotfish is considered an organ because it is a specialized structure that plays a critical role in the fish's visual system. Like other organs, the eye consists of various tissues that work together to perform a specific function—in this case, vision. The eye contains components such as the lens, retina, and cornea, which facilitate the perception of light and images, essential for the fish's survival and behavior in its environment.