Super Blue Emperor Tetra
The blue emperor tetra is a rare tank-bred variety developed from the parent wild purple emperor tetra. Super blue, or royal blue, emperor tetras display a solid blue body and light blue highlights on the classic extended fins. Male emperor tetras have slightly larger fins than the females, but like most other species, they display their colors better with both sexes present. We import our blue emperors from a breeder in Singapore whenever they become available! Pictured is a mature male in heat, but some blue and black is featured in all the fish.
Quick Facts
| Scientific Name | Inpaichthys kerri (blue variety) |
|---|---|
| Origin | Brazil (wild form); bred in Singapore |
| Size | 2.5 inches (6.4 cm) |
| Lifespan | 5 to 7 years |
| Water Temperature | 72–78°F (22–26°C) |
| Water pH | 6.0–7.0 |
| Compatibility | Best with similarly sized, peaceful community fish |
FAQ
What is the difference between the Super Blue Emperor Tetra and the wild purple emperor tetra?
The Super Blue Emperor Tetra is a tank-bred variant developed from the wild purple emperor tetra. It features a solid blue body with light blue highlights on the fins, while the wild form has a purple base with varying shades. The coloration in the blue variety is more consistent and vibrant in community tanks.
Are male and female emperor tetras distinguishable by appearance?
Males have slightly larger fins than females, but the difference is subtle. Both sexes display their full coloration best when kept together in a group.
Where are the fish sourced from?
We import the Super Blue Emperor Tetras from a breeder in Singapore, where they are bred specifically for the aquarium trade.


Madeleine Sharp –
These tetras are stunning with their bright blue bodies and elegant fins. I kept a group of five and they’re very active and peaceful. The colors pop well in a 20-gallon tank with other community fish. Easy to care for and they adapt quickly to the tank environment.
Virginia Berry –
The blue coloration is vivid and consistent. I noticed the males have slightly larger fins, but the fish look great together. They don’t require special water conditions, just a stable temperature and regular water changes.
Sally Hemmings –
I was hesitant to buy a rare breed, but the Super Blue Emperor Tetras are worth it. They’re active, colorful, and don’t stress other fish. The only thing to note is they do best in groups of at least four.