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.

More than 20 years ago, an intrepid diver ventured deep into the depths of an Oaxaca, Mexico cave system and collected some fish he found swimming in the dark. That was the start, middle and end of ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The previously unknown ...

Living in perpetual darkness deep beneath the ground, cave fish are odd little creatures. With reduced eyes and pale coloration, they were thought to found on every continent except Antarctica and ...

Scientists found an aquatic creature with skin instead of eyes in a cave of Indonesia and discovered a new species, a study said. Photo from Wibowo, Willyanto, Dharmayanthi, Rahmadi and Lumbantobing ...

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 ...

In eastern Mexico’s underground caverns and streams, a blind fish undergoes a peculiar adolescence: as it approaches maturity, taste buds begin to sprout under its chin and on top of its head, ...

The fish occur naturally in several forms adapted to living in caves; all are descendants of a surface-dwelling ancestor and vary from partially to completely blind. The cave-adapted fish also show a ...

Although we look very different from many of the other creatures on this planet, we’re more connected than you might think. Our evolutionary history means we share many of the same genes and ...