🧬 Origins and Classification
Scientific Name: Thayeria boehlkei
Family: Characidae
The Penguin Tetra is a peaceful freshwater fish that comes from the Amazon River Basin in South America. It lives in slow-moving waters and is well known for the black stripe running along its body. The Penguin Tetra is popular for its calm temperament and the way it swims together in groups, making it a great choice for community aquariums.
🎨 Appearance
Color:
- Silver body with a soft metallic shine
- A bold black stripe that runs from the mid-body to the tail at an upward angle
- Clear or lightly tinted fins
Structure:
- Slim, streamlined shape
- Slightly upright swimming posture, which gives it its “penguin-like” look
- Active swimmers that move gracefully in groups
Size:
Around 2–2.5 inches.
Lifespan:
Generally 3–5 years with good care.
🏡 Tank Requirements
Tank Size:
A minimum of 15–20 gallons, especially for a school.
Water Parameters:
- Temperature: 72–82°F
- pH: 6.0–7.5
- Soft to moderately hard water
Lighting:
Moderate lighting suits them best.
Habitat Setup:
- Live plants, driftwood, and shaded spots
- Open swimming space for schooling
- Gentle water flow preferred
🍽️ Diet
Type: Omnivorous
Foods:
- Quality flakes or micro pellets
- Frozen or live foods like brine shrimp, daphnia, or bloodworms
- Small insect-based foods for added nutrition
Feeding Tips:
Feed 1–2 small meals per day.
🤝 Behavior and Compatibility
Temperament:
Very peaceful and social.
Tank Mates:
- Perfect with other small peaceful fish like guppies, rasboras, tetras, mollies, and corydoras
- Avoid aggressive or large species
Grouping:
Should be kept in groups of 6 or more to feel secure and display natural behavior.
💡 Care Notes
Regular 20–30% weekly water changes help keep Penguin Tetras healthy and active.
They show their best schooling behavior in planted tanks with open swimming areas.
Stable water conditions and a calm community environment help them thrive.
The Penguin Tetra is a beautiful, low-maintenance fish that adds lively, coordinated movement to any freshwater aquarium.