Tiny Amazon fish located in a single stream may go extinct.
Two new colourful fish species are at danger of extinction in Brazil's Amazon Basin.
South American darters are the fish species. A total of five darter species are presently recognised.
One species, Poecilocharax callipterus, has long red-orange fins with a black patch near its tail base.
The second new species, Poecilocharax rhizophilus, is the smallest darter known.
Mature adults of this little fish are just 3/4 inch (2 cm) long. It has brilliant yellow flanks with a black stripe and a silvery white belly.
The Zoological Journal of the Linnean Society released a paper on the two new species and environmental hazards Monday.
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