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

A search for a fish lost to extinction led to a brand-new species hiding in a South African river.

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

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 ...

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

Tuna, opah, and billfishes such as marlins and swordfish are among the 0.1% of fish species that are warm-blooded. Evidence by an international team of researchers led by UC San Diego’s Scripps ...

The asprete, a rare freshwater fish found in Romania, was once considered extinct after dam construction destroyed much of its habitat. The fish’s existence was confirmed by surveys conducted in the ...