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The Cardinal Tetra (Paracheirodon axelrodi) is a small, vividly colored freshwater fish popular in aquariums worldwide. Native to the blackwater streams of the Orinoco and Rio Negro basins in South America, it thrives in warm, acidic waters rich in tannins.
Coloration:
Size: Typically 2.5 to 3 cm (about 1 inch) in length.
Lifespan: Around 4–5 years in well-maintained aquariums.
Behavior:
Habitat Requirements:
The Cardinal Tetra is similar to the Neon Tetra but distinguished by its continuous red stripe extending the full length of the body. It’s a favorite among hobbyists due to its striking appearance and compatibility with other peaceful species.