Fire Ant Tetra (Hyphessobrycon myrmex)
The Fire Ant Tetra is a small and attractive freshwater tetra admired for its warm red to orange colouration, subtle dark markings and lively shoaling behaviour. Peaceful and best kept in groups, it makes an excellent choice for planted community aquariums where subdued lighting, darker substrate and plenty of cover can help enhance its natural colour. Its compact size and calm temperament make it especially suitable for smaller, well-maintained tropical setups.
Common Name
Fire Ant Tetra
Scientific Name (Latin)
Hyphessobrycon myrmex
Maximum Size
Approximately 3–4 cm
| Parameter | Value |
|---|---|
| Water Type | Soft to moderately hard, acidic to neutral pH |
| Temperature | 22–26°C |
| Water Condition | Low to moderate hardness, pH 6.0–7.0 |
| Group Size | 6 or more for optimal behaviour |
FAQ
What is the ideal group size for Fire Ant Tetras?
Fire Ant Tetras should be kept in groups of at least six to promote natural shoaling behaviour and reduce stress.
How does lighting affect the appearance of Fire Ant Tetras?
Subdued lighting helps enhance the red to orange colouration of Fire Ant Tetras, especially when combined with a darker substrate and plenty of cover.
Are Fire Ant Tetras compatible with other fish species?
Yes, they are peaceful and suitable for community tanks with similarly sized, non-aggressive fish in a well-maintained tropical setup.

Carol Dyer –
The Fire Ant Tetras are vibrant and active in my 50-liter tank. I kept them in a group of six with dwarf corydoras and neon tetras. The red colouration stands out well under soft lighting. They don’t stress other fish and stay calm throughout the day.
Dan Ince –
I was impressed by how quickly they adapted to my planted tank. The dark substrate and hiding spots really brought out their natural orange tones. I keep them in a group of seven and they swim together in a coordinated way.
Emma Ferguson –
These tetras are a great addition to a community aquarium. They are small, peaceful, and don’t require much space. I’ve had them for three months and they remain healthy and active.