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Species group:

Other common names:

Scientific name: Danio rerio

The basics:
GloFish are a patented brand of genetically modified (GM) fluorescent Zebra Danio Danio rerio. GloFish were created in 1999, when scientists in Singapore inserted a gene from jellyfish, which produces a green fluorescence, into a Danio rerio embryo. According to the patent holder, Yorktown Technologies, "GloFish® fluorescent fish were originally bred to help detect environmental pollutants. By adding a natural fluorescence gene to the fish, scientists hope to one day quickly and easily determine when a waterway is contaminated. The first step in developing a pollution-detecting fish was to create fish that would be fluorescent all the time. Scientists soon realized the public's interest in sharing the benefits of this research, a process which lead to GloFish® fluorescent fish." GloFish were first made available in 2003, and are the first genetically modified animals to become publicly available as a pet. GloFish are generally hardy but some varieties are prone to infections at temperatures higher than 77 deg F.

GloFish are currently available in five patented colors: Starfire Red, Electric Green, Sunburst Orange, Cosmic Blue and Galactic Purple.

0-2 inches

They are a favorite schooling fish (preferably six or more) for community aquariums because of their relatively peaceful nature (they will nip fancy-finned tankmates).

GloFish, like Zebra Danios, can adapt to different tank situations. They enjoy swimming around well-planted and decorated tanks, but do well even in newly established aquariums. Because they are hyperactive and tend to escape by jumping, aquariums must have a good-fitting cover.

64.00-77.00 °F


0.000-0.000 mg/L


children, larger groups, Perfect Starter Fish, neon colored fish, lively fish


shorter lifespan, cruel practise, premature death, dye


genetically modified fish, blacklight, different prices, jelly fish protein, jellyfish DNA

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