Congo Tetra – Stunning Iridescent Rainbow-Coloured Freshwater Fish
The Congo Tetra (Phenacogrammus interruptus) is a spectacular freshwater aquarium fish admired for its shimmering rainbow coloration, elegant flowing fins, and peaceful schooling behaviour.
Native to the Congo River Basin in Central Africa, this beautiful African tetra displays a remarkable combination of metallic blue, turquoise, golden-yellow, and orange tones that change with the angle of aquarium lighting.
Mature males develop particularly impressive coloration and long, flowing fins, creating a graceful and eye-catching appearance. Females are generally smaller, with softer colours and shorter fins.
Congo Tetras are peaceful, active schooling fish that thrive in spacious planted aquariums with open swimming areas and gentle to moderate water movement.
Their brilliant iridescence becomes especially striking when maintained in groups, making them an outstanding centerpiece for larger freshwater community aquariums.
With their unique colours, graceful movement, and elegant appearance, Congo Tetras are a wonderful choice for aquarists seeking a distinctive and beautiful freshwater display.
Care Guide
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Parameter
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Details
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Scientific Name
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Phenacogrammus interruptus
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Common Name
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Congo Tetra
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Origin
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Congo River Basin, Central Africa
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Adult Size
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Approximately 6–9 cm; males usually larger
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Temperature
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23–28°C
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pH
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6.0–7.5
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Water Hardness
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3–18 dGH
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Recommended Tank Size
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150–200 L+ for a group
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Recommended Tank Length
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120 cm
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Diet
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Omnivore
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Temperament
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Peaceful, active, sometimes shy
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Care Level
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Easy to Intermediate
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Group Size
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6 minimum; preferably 8–10+
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Lifespan
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Approximately 5–10 years with good care
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Swimming Level
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Middle
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Water Flow
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Gentle to Moderate
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Aquarium Type
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Planted Aquarium / African Community Aquarium
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Special Requirements
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Group housing, open swimming space, clean water, peaceful tankmates
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