Cardinal Tetra

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Species group:

Other common names:

Scientific name: Paracheirodon axelrodi

The basics:
Cardinal Tetras are a small shoaling fish which are native to the Orinoco and Negro Rivers in South America. Cardinal Tetras are popular aquarium fish because of their iridescent color, and their hardy and peaceful nature. They are true shoaling fish - they swim together in the same direction - and are best kept in numbers of 8 to 10. They do well in a peaceful community tank.

Cardinal Tetras are often mistaken for Neon Tetras because they both have slim bodies with a bright blue-green stripe on the upper half. The difference is the bright red color on the Cardinals run from behind the gill cover all the way to the base of the caudal fin (Neons are silver from behind the gill cover to the middle of the body). Mature Cardinals are also half an inch longer than Neons

0-2 inches


As schooling fishes, Cardinal Tetras prefer spacious tanks with plenty of swimming space. Well-planted slightly acidic, and soft-watered tanks are best. They are easily distressed by too much light and substrate that is too white.

72.00-79.00 °F


100.000-200.000 mg/L

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