Goldfish can see both infrared and ultraviolet light

Goldfish Can See Both Infrared and Ultraviolet Light

Goldfish, those delightful and colorful aquatic creatures that grace our fish tanks, are known for their unique features and capabilities. One fascinating fact about goldfish is that they possess the remarkable ability to see both infrared and ultraviolet light. This ability sets them apart from many other animals and opens up a whole new world of perception for them.

Infrared light, which lies just beyond the red end of the visible light spectrum, is characterized by longer wavelengths than those of visible light. Ultraviolet light, on the other hand, has shorter wavelengths than those of visible light and lies just beyond the violet end of the spectrum. Both of these light forms are invisible to the human eye, but goldfish are equipped with specialized retinal cells that allow them to perceive these otherwise unseen wavelengths.

Researchers have discovered that goldfish have unique photoreceptor cells in their retinas called “double cones.” These double cones contain two types of photopigments, one sensitive to red light and the other to ultraviolet light. This distinct configuration of photoreceptor cells enables goldfish to see a wider range of light than humans and many other animals.

The ability to see infrared and ultraviolet light opens up new possibilities for goldfish in terms of survival and navigation. Infrared light, for instance, can be detected as heat radiating from various objects. This enables goldfish to locate hidden prey or avoid potential threats, such as predators. Additionally, ultraviolet light is useful for identifying mates, as certain patterns and colors on fish become more pronounced under ultraviolet illumination.

While goldfish possess this remarkable ability, it is important to note that their perception of infrared and ultraviolet light is different from how humans perceive color. Goldfish utilize these additional wavelengths primarily for survival and reproductive purposes rather than for visual aesthetics.

In conclusion, goldfish’s ability to see both infrared and ultraviolet light sets them apart from many other animals. Through specialized retinal cells, they can perceive light beyond the visible spectrum, enhancing their survival and reproductive capabilities. Although their perception of these wavelengths may differ from our own, it is truly awe-inspiring to consider the hidden world that goldfish can explore with their extraordinary vision.

Source: sciencing.com - Animals That Can See Infrared Light