Cardinal tetra

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This popular aquarium fish was unknown to science until 1956, when ichthyologists at the Smithsonian Institution and Stanford University published descriptions a day apart. It took a meeting of the International Commission on Zoological Nomenclature to determine the Smithsonian had published first. Found only in the Rio Negro and Orinoco Rivers, they are provided both through ecologically sustainable collecting in Brazil and fish farms in Asia and Europe.

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