GloFish® FAQ for Kids

Ever wondered where GloFish® fluorescent fish come from? Have questions about taking care of your GloFish? Curious about how aquariums work? Keep reading!

Where do GloFish come from? Each color of GloFish was developed by adding a gene into a fish embryo to make it a fluorescent color (red, green, orange, blue, purple, or pink). The fish then grew up and passed the fluorescent color to its offspring. Because of this, each variety of GloFish has the same ‘ancestor’ GloFish. For example, all of the Starfire Red® GloFish Danios come from a single red fluorescent danio.

How common are fluorescent fish in nature? Fluorescent fish are very common in nature. In fact, there are over 180 species of fish that are known to be naturally fluorescent under blue light. Fluorescent fish can be observed expressing vibrant green, red, and orange fluorescence patterns in colors that are very similar to Electric Green®, Starfire Red®, and Sunburst Orange® GloFish!

How do GloFish help fight against pollution? GloFish were originally bred to help detect pollution in water. Scientists have recently developed fluorescent fish that fluoresce only when they detect pollution.

Where does the fluorescent color come from? The fluorescence in GloFish is derived from fluorescent protein genes that naturally occur in marine organisms.

In what colors are GloFish available? GloFish come in six colors: Starfire Red®, Electric Green®, Sunburst Orange®, Cosmic Blue®, Galactic Purple®, and Moonrise Pink™.

Do GloFish actually glow? GloFish are fluorescent, which means that they absorb light and then “send it back out.” However, they do not actually glow.

How do GloFish compare to their non-fluorescent counterparts? GloFish are like their non-fluorescent counterparts, just with a brighter disposition. They are exactly the same in terms of care, including everything from general care and temperature preferences to water quality and nutritional needs.

What is the best way to care for my GloFish? Please visit our GloFish Care page for helpful care instructions.