In the underground caves of north-eastern Mexico, groups of blind fish appear to be developing cave-specific accents. The linguistic split could eventually contribute to ongoing speciation among the ...

The Mexican cave fish (code name: Astyanax mexicanus) isn't just blind and eyeless, it also has a shrunken brain. Exactly how it ended up that way is a bit of an ...

Every group of Mexican tetra fish speaks with a different accent. Scientists studied both the blind cave-dwelling populations and those that live in rivers. They all communicate using a series of ...

Astyanax mexicanus cave fish have adapted to an incredibly tough environment: chilly, pitch-dark caves that flood about once a year, providing brief feasts separated by long periods of starvation.