Researchers have rediscovered a rare fish species presumed to be extinct after it was not seen for more than eight decades.

In an underground cave of southern China, an eyeless river creature with an externally “visible” skull moved through the dark waters. Its hard-to-reach home helped it go largely unnoticed. But when ...

Colorado Parks and Wildlife biologists were conducting a routine fish survey on the Colorado River when they made an ...

In a river of southern China, a “slender” creature with “tiny scales” under its skin paused to rest along the gravel riverbed. Its coloring helped it blend in, but not well enough. Nearby scientists ...

Scientists caught an “armored” river creature with a maze-like ... Looking at the fish in a laboratory, researchers quickly ...

Residents of the Ottawa Valley, as well as visitors, appreciate the majestic Ottawa River as a large component of what makes ...

The aquarium is seeking state and federal funds to build a program that would rear thousands of fish for the St. Louis River. (Jana Hollingsworth/The Minnesota Star Tribune) ...

Scientists caught an “armored” river creature with ... Looking at the fish in a laboratory, researchers quickly realized they’d discovered a new species: Hypancistrus seideli, or Seidel ...

The invasive pest tilapia has been found in the Upper Mitchell River catchment in ... Gulf would devastate the species. He said while barramundi was a saltwater fish, juveniles tended to stay ...

See All Key Ideas Scientists and Indigenous community members documented 27 new-to-science species in Peru’s Alto Mayo region, including four new mammals and a bizarre “blob-headed” fish ...