The tiny Amazon molly (Poecilia formosa) has always fascinated researchers because, according to the rules of evolution, it shouldn't have survived as a species, let alone thrive as a species for over ...

Amazon mollies don't need a man, and never will. A new study finds they can purge and repair genetic mutations that would ...

Deep in the vast rivers and flooded forests of the Amazon Basin, there lives a fish that appears to be prehistoric in both size and appearance. The arapaima, also called the “pirarucu,” is one of the ...

The Amazon molly reproduces without sex. A genomic copy-and-paste trick called gene conversion may explain how it avoids evolutionary meltdown.

For riverside communities along the Amazon, fish is not a menu choice—it is a lifeline. Millions of people in the Brazilian ...

Add Yahoo as a preferred source to see more of our stories on Google. Thousands of fish species — about 2,500 of them named — call the Amazon River home, but scientists estimate nearly half of the ...

Scientists in the Colombian Amazon have identified a tiny freshwater fish species called Priocharax rex, measuring just 0.8 inches in length. This discovery is significant as it represents the largest ...

Two years of record-breaking drought have dealt a heavy blow to what is arguably the Amazon's most successful sustainable economy: the managed fishery for the giant pirarucu. In Brazil´s Amazonas ...