GloFish is initially genetically modified. In the later years, the gene is passed from the parents to the offspring.  The fishes are not injected anymore. 

The beginner’s guide will help you understand the glofish better and this, in turn, would help you keep them as happy fishes in your aquarium.

Glo Fish – Overview

Common NameThe common names of these fish are Red Danio, Green Danio, Purple Danio, Sunburst Orange, and Blue Danio. 
Scientific NameDanio rerio is the scientific name of this fish.
Habitat or OriginThe fish is genetically modified. They are aquacultured. Their habitat is freshwater habitat.
Average SizeThe size of this fish is 2 inches (5 cm).
ColorationThe fish is found in several colors like red, orange, green, purple, and blue.
Life SpanThe life span of this fish is 2 – 4 years. On average they live up to 3.5 years. They can also live for 5 years under proper conditions.
DietHigh-quality flakes can be given as food. They can be given brine shrimp, bloodworms, etc.,
Gender IdentificationThe females develop a pronounced stomach while they are carrying eggs. However, they cannot be distinguished when they are young.
BehaviorThe fish has a fin-nipping tendency. They can be kept together in a group of 6 or more to reduce this behavior.
CompatibilityThe fish can be kept along with Barbs, Tetra, Angelfish, other danios, and freshwater fishes. 3 or 6 Glofishes can be kept together in the tank.
Ideal Tank ConditionsThe fish can be kept under dark light and dark-colored gravel.
Water ParametersThe temperature of the water should be 65 – 75 degrees F. (18 – 24 degrees C). Water hardness is 5-19 degrees dH.
BreedingBreeding the glo fish is not legal. Maintaining the temperature to 78 degrees F and feed them high-quality food during spawning. The female lays eggs in the marbles in the substrate. The eggs hatch in 2 – 3 days. Initially, they can be fed live paramecia and microorganisms. After a few days – around 9 days later they can be fed brine shrimp.
Common DiseasesThe fishes tend to get affected by the freshwater disease. They are also affected by mycobacteriosis, velvet disease, and intestinal capillariasis. 
Approximate CostThey are expensive fishes. 3 fishes would cost $20 to $25
What to look when buyingCheck if the fins are proper. The fishes are available in various colors. Hence look for the color that you wish for.
Species in the MarketThere are 6 different varieties available in the market Starfire red, Electric Green, Sunburst Orange, Cosmic blue, Galactic purple, Moonrise pink

Gallery of Glo Fish