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Datasheet
| Minimum Tank Size | 80 litres / 21.13 US gallons |
| Maximum Size | 4.2cm / 1.65inches |
| Temperature | 23°C / 73.40°F - 27°C / 80.60°F |
| Hardness | 1.01dgH / 18ppm - 12.05dgH / 215ppm |
| pH | 5.0-7.5 |
Behaviour:
The Emperor Tetra proves to be an excellent addition to a community tank, displaying lively and peaceful behavior while offering a striking contrast in coloration to many other species. It thrives alongside livebearers, danionins, rasboras, other tetras, and peaceful bottom dwellers such as Corydoras. Compatibility extends to various gouramis and dwarf cichlids, but caution is advised with larger species that may view them as prey. Maintaining a group of at least six individuals is recommended for this shoaling species, with larger numbers enhancing their overall appearance. Although rival males can be territorial, if given ample space in a well-decorated tank, serious damage during disputes is minimal.
Feeding and Diet:
As micropredators, Emperor Tetras naturally feed on small insects, worms, crustaceans, and zooplankton. In captivity, they accept dried foods but thrive on a varied diet that includes small live and frozen options like Daphnia and Artemia. Regular feeding of such fare not only enhances their coloration but also induces breeding conditions.
Reproduction & Dimorphism:
Breeding Emperor Tetras is relatively straightforward, requiring a separate dimly lit tank equipped with fine-leaved plants or spawning mops for egg deposition. Water conditions conducive to spawning include soft acidity and a temperature range of 75-80°F. Successful breeding can be achieved in pairs or groups, with proper conditioning and the removal of adults to prevent egg predation. Males exhibit larger size, vibrant colors, and extended fins, notably in the dorsal, anal, and caudal areas as they mature. Distinguishing features include a blue iris in males and a green iris in females.
Habitat and Distribution:
Endemic to the San Juan and Atrato river basins in Colombia, Emperor Tetras inhabit slower-moving sections of rivers, minor tributaries, and backwaters. They coexist with various fish species like Priapichthys, Cichlasoma atromaculatum, Andinoacara, Geophagus pellegrini, Lebiasina chocoensis, along with other characids, gymnotids, and loricariids. While wild-caught specimens are rare, commercial breeding sustains the availability of Emperor Tetras in the aquarium trade.
Aquarium Setup:
Maintaining an Emperor Tetra aquarium requires a minimum tank size of 80 liters, with water parameters ranging from pH 5.0-7.5, hardness of 18-215 ppm, and a temperature of 23-27°C. The setup should include appropriate tank mates, live plants, and ample space for shoaling behavior. British Essentials recommends creating a captivating environment that mimics the tetra's natural habitat for optimal health and natural behaviors.