GloFish Tetra (Gymnocorymbus ternetzi, genetically modified Black Skirt Tetra)
Overview
Common Name: GloFish Tetra
Scientific Name: Gymnocorymbus ternetzi
Region of Origin: South America (modified in captivity)
Maximum Size: 2.5 inches (6.4 cm)
Minimum Tank Size: 10 gallons
Lifespan: 3–5 years
Care Level: Beginner
Temperament: Peaceful
Preferred Tank Zone: Middle
Schooling Behavior: Yes – keep in groups of 5 or more
Description:
GloFish Tetras are genetically modified versions of the Black Skirt Tetra, engineered to fluoresce under blue LED lighting. Available in multiple fluorescent colors like green, pink, orange, and purple, these eye-catching fish are active and hardy. They’re perfect for beginners looking to add a bold pop of color to community tanks.
Water Parameters
- Temperature: 70–80°F (21–27°C)
- pH Range: 6.5–7.5
- Water Hardness (GH): 5–19 dGH
- Carbonate Hardness (KH): 4–10 dKH
- Water Type: Freshwater, moderate hardness
Aquascape Recommendations
- LED or actinic lighting enhances their glow
- Dark substrate to contrast colors
- Open swimming space with some plants for shelter
- Avoid strong currents
Feeding & Diet
Diet Type: Omnivore
Core Diet
- High-quality tropical flakes or pellets
- Micro granules designed for tetras
Supplements & Treats
- Brine shrimp
- Daphnia
- Bloodworms (occasional)
Feeding Notes:
Feed in small portions once or twice daily. Ensure all food is consumed within 2 minutes to avoid overfeeding.
Behavior & Compatibility
- Temperament: Peaceful
- Best Tank Mates: Corydoras, small rasboras, danios, mollies, guppies
- Avoid Housing With: Aggressive or fin-nipping fish
- Territorial Behavior: Non-territorial
- Behavior Type: Schooling
- Activity Level: Active, especially under blue lights
Breeding
- Breeding Method: Egg scatterer
- Breeding Setup: Use a separate breeding tank with soft substrate and fine-leaved plants
- Spawning Behavior: Scatter eggs; adults may eat them
- Fry Care: Remove parents post-spawning, feed fry infusoria or powdered food