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.

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 ...

The first mammals first lived some 160 million years ago, in a world ruled by reptiles. And now scientists suggest that hiding in the dark from these terrifying beasts may have left an imprint in ...

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 ...

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 ...

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, ...

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 ...

June 2 (UPI) --Surface-dwelling varieties of the Mexican tetra, or Mexican cave fish, have eyes to see, but many varieties, living in caves where light cannot penetrate, do without eyesight. Blind and ...

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 ...