Yellowfin Chalceus – Chalceus erythrurus S 5–6 cm | Magnificent open-water fish

The Yellowfin Tetra (Chalceus erythrurus) is an impressive, colorful schooling fish from the Amazon region. With its shimmering silver body, bright yellow fins, and reddish caudal fin, it is one of the most elegant and striking species of its genus. Especially in motion, its scales reflect light with a fascinating shimmer – a real eye-catcher in the aquarium.

The Yellowfin Tetra is an active, keen swimmer that requires plenty of space. It thrives particularly well in large, well-structured aquariums with ample swimming room and gentle currents. In groups, it displays impressive, dynamic social behavior.

🌿 Characteristics & Care:

🐠 Size: 5–6 cm (S), Adult size approx. 12–14 cm
🌎 Origin: South America (Amazon Basin, Orinoco, Guyana)
🌡️ Temperature: 24–28 °C
💧 pH-value: 6.0–7.5
⚖️ Total Hardness: up to 15 °dGH
🐟 Social Behavior: Peaceful, but lively – group keeping recommended (from 5 fish)
🌾 Aquarium: From 200 l, with open swimming space and stable cover (prone to jumping!)

🍽️ Feeding:
Eats live and frozen food, but also accepts high-quality dry food. A protein-rich, varied diet supports growth and vibrant colors.

💡 Tip:
A dark substrate, slightly subdued lighting, and a gentle current particularly emphasize the metallic sheen and yellow fins.

👉 Conclusion:
The Yellowfin Tetra (Chalceus erythrurus) is an elegant, active, and colorful schooling fish that impresses with its vibrant colors and dynamic behavior – ideal for large, well-structured aquariums with a South American flair.