The UN assessment of the state of migratory freshwater fish revealed an 81% decline in the last 50 years.

Freshwater fish are now the most imperilled vertebrates on the planet, with migratory species being particularly vulnerable ...

A first-of-its-kind assessment of migratory freshwater fish brings to light many species in need of international protection.

In the wide, sandy stretches of Brazil’s Araguaia River, the piraíba, South America’s largest catfish, is a cornerstone of ...

Bass in southeastern rivers turn out to be two species, highlighting hidden diversity and growing threats from habitat ...

Hidden beneath the surface of the world’s rivers, some of Earth’s great animal movements unfold—migrations that rival, in ...

Some of the longest, most important migrations of species on Earth are happening beneath the surface of the world's rivers ...

A new species of Amazonian fish, Pyrrhulina punctata, has been discovered in Peru, revealing previously unknown biodiversity ...