Tim's Tropical Fish



Home

Galleries

Care

Info

Saltwater


Glofish

Danios & Killis

Glofish, Danio rerio

GloFish are Zebra Danios that have been genetically altered by introducing the DNA of a sea anemone.  GloFish are currently available in red, yellow and green but only in locations permitted by law.  Canada and California have prohibited them. 

GloFish are identical in behavior to Zebra Danios.  Zebra Danios originally come from India.  They are an excellent beginning fish for aquarists because of their hardiness and the ease with which they breed.  They like to swim in schools and are very active. They eat flake foods.

Scientific Name: Danio rerio (genetically altered)
Family: Cyprinid
Temperature: 18 - 28 C; 64 - 82 F
pH: 7
Size: 6 cm; 2.5 inches
Life Span: 5 - 7 years
Breeding: Easy, Egglayer
 

Compatibility:

Bettas, Barbs, Catfish, Chinese Algae Eater, Clown Loach, Gouramis, Molly, Platy, Plecos, Rainbows, Red Tailed Shark, Swordtail

See below for further information on the best method of displaying GloFish and Frequently Asked Questions about them.

DISPLAY

GloFish™ fluorescent fish absorb light and then re-emit it. These never quite match the colors shown on the GloFish.com web site.  For best results, they suggest the following:

Daytime Viewing – A traditional white aquarium light (such as a fluorescent or halogen light) is ideal for daytime use. Because GloFish™ fluorescent fish absorb light and re-emit it, the fish's color will appear brighter and more vibrant as the amount of light used is increased. White gravel will further deepen the color since the reflective white color of the gravel will increase the overall amount of light in the tank.

Nighttime Viewing – Although a black light can cause these fish to glow, our experience has shown that the diffusion of light in the water does not create a worthwhile effect.  We don't recommend the purchase of a black light.

FAQ

Where do GloFish™ fluorescent zebra fish come from?

How common is the use of fluorescent zebra fish in science?

How exactly do fluorescent zebra fish help in the fight against pollution?

What are the differences between fluorescent zebra fish and other zebra fish?

Do fluorescent fish glow?

Does the fluorescence harm the fish?

Do you have to add a fluorescence gene to each fish before it hatches?

What will happen if a fluorescent zebra fish escapes into the waterways?

What if a fluorescent zebra fish is eaten by another animal in the wild?

What will happen to me if I eat one of these fish?

Glofish, Danio rerio

Where do Glofish come from?

Fluorescent zebra fish were specially bred to help detect environmental pollutants. By adding a natural fluorescence gene to the fish, scientists will be able to quickly and easily determine when our waterways are contaminated. The first step in developing these pollution detecting fish was to create fish that would be fluorescent all the time. It was only recently that scientists realized the public's interest in sharing the benefits of this research.

How common is the use of fluorescent zebra fish in science?

For over a decade, fluorescent zebra fish have been relied upon by scientists worldwide to better understand important questions in genetics, molecular biology, and vertebrate development. Fluorescent zebra fish have been particularly helpful in understanding cellular disease and development, as well as cancer and gene therapy.

How exactly do fluorescent zebra fish help in the fight against pollution?

To achieve their goal, scientists are in the process of adding a "switch" that will cause the always fluorescing zebra fish to selectively fluoresce in the presence of environmental toxins. A non-fluorescing fish will signal that the water is safe, while a fluorescing fish will signal trouble. Although these fish are not currently available, scientists hope to complete this work soon. To help further the research, a portion of the proceeds from sales of all GloFish™ fluorescent fish goes directly to the lab where these fish were created.

What are the differences between fluorescent zebra fish and other zebra fish?

Aside from their brilliant color, fluorescent zebra fish are the same as other zebra fish in every way. This includes everything from general care and temperature preferences to growth rate and life expectancy.

Do fluorescent fish glow?

Fluorescent fish absorb light and then re-emit it. This creates the perception that they are glowing.

Does the fluorescence harm the fish?

No. The fish are as healthy as other zebra fish in every way. Scientists originally developed them several years ago by adding a natural fluorescence gene to the fish eggs before they hatched. Today's GloFish™ fluorescent fish are bred from the offspring of these original fish.

Do you have to add a fluorescence gene to every fish before it hatches?

No. Today's GloFish™ fluorescent fish are bred from the offspring of fluorescent zebra fish that were originally developed several years ago to help fight environmental pollution. Each new GloFish™ fluorescent fish inherits its unique color directly from its parents, maintains the color throughout its life, and also passes the color along to its offspring.

What will happen if a fluorescent zebra fish escapes into the waterways?

Zebra fish are tropical fish and are unable to survive in non-tropical environments. They have been sold to pet owners worldwide for more than fifty years. Despite all these years of aquarium ownership, zebra fish are only found in tropical environments, such as their native India. However, it is important to remember that GloFish™ fluorescent fish are intended for use as aquarium fish only, and should never be intentionally released into the wild.

What if a fluorescent zebra fish is eaten in the wild by another animal?

For an animal in the wild, eating a fluorescent zebra fish is the same as eating any other zebra fish. Their fluorescence is derived from a gene that is already found in nature and is completely safe for the environment. Just as eating a blue fish would not turn a predator blue, eating a fluorescent fish would not make a predator fluoresce. However, please remember that fluorescent zebra fish are NOT intended for human consumption.

What will happen to me if I eat one of these fish?

Fluorescent zebra fish, like all ornamental fish, are NOT intended for human consumption; they should never be eaten.