Researchers identified a new freshwater fish species in South Africa after years of genetic testing and analysis.

Whether it's redfin pickerel in the Kennebec River or sturgeon in the Great Lakes, nearly one-third of freshwater fish ...

A dozen fish pulled from a South African river sparked years of debate before being confirmed as a new species.

Scientists used AI to analyze 10,631 freshwater fish species and found that stable, connected rivers are critical for ...

Species numbers alone do not fully capture how ecosystems are changing. In a global study, scientists analyzed long-term data ...

A strange, big-eyed "dragonfish" hidden under Antarctic ice for 780,000 years has finally been discovered - and it's already at risk.

A colorful reef fish from the Maldives is the first new-to-science species to be described by a Maldivian scientist. Cirrhilabrus finifenmaa has been named by Ahmed Najeeb, a biologist from the ...