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

Freshwater fish are vanishing from the world’s rivers, with migratory species down 81 percent due to dams, pollution, and ...

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

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