Infernal Tetra Care Guide
Hemigrammus sp "Infernalis" · Freshwater Fish
What Infernal Tetra look like
The Infernal Tetra (Hemigrammus sp 'Infernalis') exhibits a laterally compressed, fusiform body shape, reaching a maximum adult size of approximately 2 inches (5 cm). This species is characterized by its striking dark body coloration, which serves as a defensive adaptation against predation, complemented by vivid red accents that enhance its visual appeal. The body is adorned with bold, contrasting dark markings that create a dramatic appearance, aligning with its common name. Notable morphological features include a well-defined lateral line, which aids in hydrodynamic sensing, and a small adipose fin situated posterior to the dorsal fin. The dentition is typical of the Characidae family, with small, sharp teeth adapted for an omnivorous diet. Sexual dimorphism is subtle, with females being slightly rounder and more robust than males, particularly during the breeding season.
Behavior & temperament
The Infernal Tetra is a social species that thrives in small to medium-sized groups, exhibiting a tendency to form loose schools in the mid to upper water column of its natural habitat. This species is generally peaceful and exhibits a non-aggressive temperament, making it suitable for community aquariums. Breeding behavior is characterized by egg scattering, where females release eggs into the water column, allowing for external fertilization. The species prefers densely planted environments that provide cover and foraging opportunities, reflecting its natural inclination towards a benthic-pelagic lifestyle. Social hierarchy within schools is minimal, with individuals displaying a cooperative behavior rather than strict dominance hierarchies.
Diet & feeding
In the wild, the Infernal Tetra is an omnivore, feeding on a varied diet that includes small invertebrates, plant matter, and detritus. In captivity, it requires a balanced diet consisting of high-quality flake food, supplemented with live or frozen foods such as brine shrimp and daphnia to ensure optimal health and coloration.
Behind the name
Hemigrammus (half line; referring to the lateral line structure); sp. 'Infernalis' (from Latin 'infernis', meaning 'of the underworld', reflecting its dark coloration).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Infernal Tetra?
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