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.

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

SACRAMENTO — A fish species that's been gone for more than 50 years is now making a comeback. The pond at Granite Regional Park is the new home of the long-lost aquatic species, the Sacramento perch.

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

Many invasive fish, plus other animals and plants, are ecological nuisances in our state. So the NC Wildlife Resources Commission groups them all together as “Aquatic Nuisance Species,” teaching local ...