Emperor Tetra (Nematobrycon palmeri)

Emperor Tetra (Nematobrycon palmeri) is a gorgeous and peaceful freshwater species, prized for its shimmering colors and elegant finnage. 

Species Profile

• Scientific Name: Nematobrycon palmeri
• Common Name: Emperor Tetra
• Family: Characidae
• Origin: Colombia (slow-moving rivers and streams)
• Adult Size: ~4–5 cm
• Current Size: Usually sold at 2–3 cm

Tank Requirements

• Tank Size: Minimum 20 gallons for a small school
• Water Parameters:
  • Temperature: 23–28°C (73–82°F)
  • pH: 6.0–7.5
  • Hardness: Soft to moderately hard
• Aquascape: Heavily planted with shaded areas and open swimming space; subdued lighting enhances colors

Behavior & Compatibility

• Temperament: Peaceful, slightly territorial males
• Tankmates: Ideal for community tanks with other calm species (avoid fin-nippers)
• Schooling: Best kept in groups of 6 or more; males display beautiful fin extensions

Diet

• Omnivorous: High-quality flakes, micro pellets, frozen/live foods (daphnia, brine shrimp)
• Feeding Frequency: 2–3 times daily in small portions

Special Notes

• Males have longer fins and more intense coloration than females.
• Known for their shimmering blue/purple hues and striking eye color.
• Hardy but thrives in stable, clean water conditions.