Blue Devil Tetra – Rare South American Tetra with Brilliant Blue Iridescence
The Blue Devil Tetra (Hyphessobrycon sp. "Blue Devil") is a rare and captivating freshwater aquarium fish admired for its striking metallic-blue highlights, distinctive dark lateral stripe, and elegant appearance.
Native to South America, this unusual tetra displays beautiful blue reflections around its eyes and body, complemented by subtle golden tones and contrasting dark markings.
Under suitable aquarium lighting, its iridescent colours can shift in intensity, creating an impressive visual display against lush green aquatic plants and natural driftwood.
Mature males may develop attractive orange-red accents on their fins and lower body during social displays, adding another dimension to their appearance.
Blue Devil Tetras are best maintained in groups within mature, well-planted aquariums that offer shaded areas, stable water conditions, and open swimming space.
Despite their dramatic name, these small tetras are generally considered peaceful and can make fascinating additions to carefully selected freshwater community aquariums.
With their distinctive coloration and uncommon availability, Blue Devil Tetras are an excellent choice for aquascaping enthusiasts and collectors of rare South American fish.
Care Guide
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Parameter
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Details
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Scientific Name
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Hyphessobrycon sp. "Blue Devil"
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Common Name
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Blue Devil Tetra
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Other Trade Names
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Blue Shoulder Devil Tetra
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Origin
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Brazil, possibly upper Tapajós / Juruena drainage
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Adult Size
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Approximately 3–4 cm
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Temperature
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23–27°C
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pH
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5.5–7.5
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Water Hardness
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Soft to moderately hard; approximately 2–10 dGH
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Recommended Tank Size
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75 L+
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Recommended Tank Length
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80 cm preferred
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Diet
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Omnivore / Small Invertebrates
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Temperament
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Generally Peaceful
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Care Level
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Easy to Intermediate
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Group Size
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10+ recommended
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Lifespan
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Approximately 3–5 years, estimated
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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 / South American Community
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Special Requirements
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Group housing, shaded areas, stable water
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