A new species of Amazonian fish, Pyrrhulina punctata, has been discovered in Peru, revealing previously unknown biodiversity ...

The cardinal tetra is one of the most popular pet fish in the world. They look like little red and blue sequins. You've ...

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

Hosts of NPR's science podcast discuss new findings about long-distance fly migration, an unexpected impact of emissions in the Amazon, and fish noises. All right, it's time now for our science news ...