Blue Emperor Tetra

Blue Emperor Tetra “Inpaichthys kerri”

  • Maximum size 3–4 centimetres
  • Temperature range 24–27 °C
  • Prefers softer slightly acidic water.
  • Lifespan 5–10 years


These fish originate from Aripuana river and upper Rio Madeira basin, Mato Grosso, Brazil in South America.

They have a darker stripe that runs along their body and are blue purple above it with a silver abdomen. They are placid in nature and best kept in groups of at least six with other tetras and small fish as larger fish will bully or prey on them.

They are omnivores enjoying a wide range of foods such as flake food, bloodworms, daphnia and brine shrimp.

They like subdued lighting, dark gravel or substrate, floating plants and bogwood helps darken the water and simulate their natural habitat.

Males are slimmer and have a blue adipose fin whereas the females have much deeper bodies and a red adipose fin.

Breeding is not particularly easy in the home aquarium as they are egg layers and the eggs are photosensitive. Adults will eat their own spawn and fry. They usually spawn tiny clear eggs early in the morning over fine leaved plants. The eggs will hatch between 24 and 48 hours later and will become free swimming after 3 to 4 days.

The fry should be fed infusoria for around ten days and can later be fed crushed flake food or brine shrimp.



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