Biologists have shown that an attempt at genetic rescue for the Florida panther 30 years ago has been a success.

Scientists found a “slender” fish with a “large” head in a river of southern Mexico and discovered a new species, a study ...

In a small river of South Africa, a “long”-headed creature swam through the water with several other animals. Its “silvery-white” body glinted in the light. Something about it caught the attention of ...

Scientists broke open rocks of a riverbank, found brown fish with small eyes and discovered a new species: Sambaíba ghost electric knifefish, study said.

Two fishermen in Delaware caught state-record fish that are said to be valued dining fare, but officials want them dead for different reason.

Fishing yields in the Upper Paraná River, on the border between the Brazilian states of São Paulo, Paraná, and Mato Grosso do Sul, have fallen by around 50% in two decades.

Scientists discover two new Priocharax miniature tetra fish species, one of which is mostly translucent, in Brazil’s Amazon basin in blackwater systems.