Cardinal Tetra (Paracheirodon axelrodi) (Aquarium Glaser)

Cardinal Tetra (Paracheirodon axelrodi) is a delightful freshwater fish native to the upper Orinoco and Negro Rivers in South America.

Appearance:

1. • Cardinal Tetras have a slender, torpedo-shaped profile.
   • They closely resemble Neon Tetras, with two distinct stripes of red and blue running from their nose to the tail.
   • The blue stripe shimmers with an iridescent finish, creating a beautiful glow in the right lighting conditions.
   • Directly below the blue stripe is a thicker band of bright red that runs the entire length of their body and even bleeds into their transparent tail.
   • The main difference between Cardinal Tetras and Neon Tetras is the length of the red stripe: for Neons, the red color only marks half of the body.

2. Tank Size and Water Parameters:

   • Cardinal Tetras are peaceful by nature and make wonderful additions to community tanks.
   • They grow to about 2 inches (approximately 5 cm) in total length.
   • Maintain stable water conditions to ensure their well-being.
   • Ideal water parameters include a temperature range of 73F to 81F (22C to 27C), a pH level of 5.5 to 7.0, and soft to moderately hard water.
   • Provide plenty if hiding spots and plants in the aquarium to replicate their natural habitat.

3. Behavior and Tank Mates:

   • Cardinal Tetras are active and social fish.
   • They exhibit beautiful shoaling behavior even in small groups.
   • Consider keeping them in schools of at least six to eight individuals.
   • Suitable tank mates include other peaceful community fish, such as other tetras, rasboras, and small catfish.
   • Avoid aggressive or fin-nipping species.
   • Provide a well planted aquarium with subdued lighting to make them feel secure.

4. Lifespan:

   • In captivity, Cardinal Tetras can live between four and five years.
   • Interestingly, they tend to live longer in captivity than in the wild.