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.

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

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

As the Atlantic warms, many fish along the east coast of North America have moved northward to keep within their preferred temperature range. Black sea bass, for instance, have shifted hundreds of ...

A fish species not recorded in the wild for more than 20 years was rediscovered in Bolivia, providing a boost for biodiversity. As published in the journal Nature Conservation, scientists discovered ...

The ivory-billed woodpecker, along with 22 other species of birds, fish, mussels and other wildlife, is set to be declared extinct and removed from the endangered species list, US wildlife officials ...

A new study finds thousands of imperiled plants and animals meet Endangered Species Act criteria yet remain unlisted.

Hundreds of endangered fish that were rescued from their habitat due to the Palisades Fire have returned home after being held for several months at two local aquariums. The endangered northern ...