Red Fin Penguin Tetra – Distinctive South American Aquarium Fish
The Red Fin Penguin Tetra is an attractive freshwater aquarium fish admired for its elegant body markings, contrasting fin coloration, and distinctive swimming appearance.
Offered in the aquarium trade under the name "Red Fin Penguin Tetra," this unusual fish is an appealing choice for aquarists seeking something different from the more commonly available tetra species.
Its contrasting markings and colourful fins can create an eye-catching display against lush green aquatic plants, natural driftwood, and dark aquarium substrates.
A well-established aquarium with stable water conditions, open swimming areas, and planted shelter provides an attractive environment for these fish.
With its distinctive appearance and uncommon trade name, the Red Fin Penguin Tetra makes an interesting addition to a carefully maintained freshwater fish collection.
Care Guide
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Parameter
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Details
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Scientific Name
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Thayeria sp. "Red Fin"
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Common Name
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Red Fin Penguin Tetra
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Other Names
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Red Tail Penguin Tetra, Teles Pires Penguin Tetra
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Origin
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Brazil, South America; Teles Pires association reported
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Adult Size
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Approximately 4–6 cm
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Temperature
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24–28°C
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pH
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6.0–7.5
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Water Hardness
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Preferably soft to moderately hard
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Recommended Tank Size
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75–100 L+
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Recommended Tank Length
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75–80 cm+ preferred
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Diet
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Omnivore / Micropredator
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Temperament
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Generally Peaceful, Active
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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 8–12+
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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 / Upper
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Water Flow
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Gentle to Moderate
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Aquarium Type
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Planted Community / South American Biotope
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Special Requirements
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Open swimming space, group housing, stable water
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