Black Neon Tetra (Hyphessobrycon herbertaxelrodi)

The Black Neon Tetra (Hyphessobrycon herbertaxelrodi) is a highly popular, peaceful, and exceptionally hardy freshwater schooling nano fish native to the Paraguay River Basin of Brazil. Known for its striking horizontal black and shimmering white stripes combined with a distinctive red eye patch, it is widely considered an excellent, disease-resistant alternative to the standard neon tetra for community aquariums.

Behavior and Schooling Dynamics

Strictly Social: Must be kept in groups of at least 6, though 10 to 20 are ideal.

Stress Reduction: Larger groups promote tight schooling and dramatically decrease stress levels.

Tank Strata: They confidently occupy the middle to top sections of the water column.

Visual Guides: Their glowing white stripes act as a structural reference point for tracking tankmates in dark waters.

Habitat Setup Requirements

Substrate & Décor: A dark gravel substrate combined with natural driftwood replicates their native flooded forest environments.

Live Plants: Heavy planting offers crucial security while maintaining open central spaces for swimming.

Subdued Lighting: Use floating surface plants to dim bright LED lighting, which highlights their iridescent colors.Secure Lid Required: These fish are skilled jumpers; a tight lid is necessary to prevent escape.

Diet and Nutrition

Black Neon Tetras are opportunistic omnivores with small mouths. They feed actively midwater and rarely pick food off the bottom:

Daily Base Diet: High-quality micro-pellets, crushed tropical flakes, or specialized bug bites.

Weekly Supplements: Live or frozen foods like baby brine shrimp, Daphnia, or Cyclops to enhance color brilliance.

Feeding Schedule: Feed once daily, offering only what they can fully consume within 2 minutes.

Ideal Tankmates

Because of their calm, non-aggressive demeanor, they thrive alongside other peaceful species:

Bottom Dwellers: Pygmy Corydoras or Otocinclus catfish to clean up fallen food debris.

Other Nano Fish: Harlequin Rasboras, Ember Tetras, or peaceful Honey Gouramis.

Invertebrates: Safe with adult Cherry and Amano shrimp, though tiny shrimplets may be eaten without dense moss cover.