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 ...

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 ...

A blind cave fish that has spent millions of years underground isolated from evidence of day and night still has a working biological clock, albeit an unusually distorted one, scientists find. This ...

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 ...

University of Maryland biologists have identified how changes in both behavior and genetics led to the evolution of the Mexican blind cavefish (Astyanax mexicanus) from its sighted, surface-dwelling ...

Scientists have discovered the world’s largest known subterranean fish in a cave in northeastern India. The “troglomorphic fish” was discovered last year, according to recently released research. “The ...

The Fish and Wildlife Service says it needs more time to examine the science while considering protections for two species of small fish that live in an aquifer. Two species of blind cave-dwelling ...

The cave river was calm, cold, and completely dark beyond the headlamps. As they swam deeper, movement in the water became impossible to ignore. Blind fish brushed past in the darkness, navigating ...

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 ...

A living specimen of the new species, Sinocyclocheilus longicornus, in a laboratory tank. Lurking within the dark waters of Chinese caves is a bizarre fish species that has an uncanny resemblance with ...

A cave-dwelling fish has been swimming the waters of India unknowingly. But researchers have just discovered the mysterious fish, which they named Schistura densiclava, in Meghalaya’s Krem Mawjymbuin ...