Cardinal tetras Paracheirodon axelrodi waking up in an aquarium. Just after the lights were turned on. Its skin yet in a pink tone.  (Ph...

Photo   by  Leino88   The Cardinal Tetra, Paracheirodon axelrodi is closely related to the very popular Neon Tetra Paracheirodon inn...

Cardinal tetras Paracheirodon axelrodi waking up in an aquarium. Just after the lights were turned on. Its skin yet in a pink tone. (Ph...

Neon Tetra Photo: Wikipedia Cardinal tetras are beautiful fish because of their bright red color. They are very popular among the fish...

The cardinal tetra or Paracheirodon axelrodi is native to the Amazon River. Cardinals are among some of the most colorful freshwater fish ...