Crystal Red Tetra
The Crystal Red Tetra is a beautiful nano fish native to the Rio Araguaia in Brazil. In the wild, their intensely bright red coloration helps them blend into the reddish-brown water of tannin-stained tributaries. Mature, healthy specimens in captivity display this brilliant red color more than any other tetra, making them look absolutely incredible when kept among green plants.
This species closely resembles young Serpae Tetras, but can be distinguished by a smaller black spot on the dorsal fin and white tips on its fins.
Key Features
| Feature | Detail |
|---|---|
| Origin | Rio Araguaia, Brazil |
| Size | Approx. 1.5 inches (3.8 cm) |
| Coloration | Intense red with white fin tips |
| Dorsal Fin Spot | Small black spot |
FAQ
How does the Crystal Red Tetra differ from the Serpae Tetra?
The Crystal Red Tetra has a smaller black spot on the dorsal fin and white tips on its fins, while Serpae Tetras lack these features and have a more uniform red coloration.
Is the Crystal Red Tetra easy to breed in captivity?
No, the Crystal Red Tetra is very difficult to spawn in captivity, and breeding is rare.
What kind of environment does it prefer?
It thrives in tannin-stained, soft water with dense vegetation, mimicking its natural habitat in the Rio Araguaia.


Stephen Simpson –
The Crystal Red Tetra is stunning in a planted nano tank. The bright red color really stands out among the green plants. It’s active and peaceful, and the white fin tips are very noticeable. A rare and beautiful addition to any community tank.
Julian Cornish –
I’ve kept several tetra species before, but this one is truly unique. The red color is vibrant and the fish seems healthy and curious. It’s a bit shy at first, but settles into the tank well with time.
Evan Martin –
The fish looks exactly like it does in the photos—intense red with white fin tips. I was impressed by how it blends with the tannin-stained water. It’s a great choice for a small, colorful aquarium.