Discovery of the 2nd Neon Tetra – Paracheirodon axelrodi

By Heiko Bleher The discovery of neon number two, the cardinal tetra Just as the neon tetra was a sensation before World War II, in the same way the cardinal tetra (see below) was a post-war sensation. Round about 1950 it was rumored that a new neon had been discovered somewhere in the Rio Negro [...]
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