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

In this video i will be going through 5 of the largest freshwater fish in the world. There are many giant freshwater fish in the worlds rivers and lakes but what fish is the biggest freshwater fish in ...

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

A sweeping global report finds that migratory freshwater fish are in steep decline, with populations down roughly 81% since ...

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

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

Climate change is rapidly altering freshwater ecosystems — raising temperatures, altering flood pulses and oxygen levels — and driving complex, region-specific changes in how fish grow, migrate and ...

Researchers in Alberta uncovered a fossil fish that rewrites the evolutionary history of otophysans, which today dominate freshwater ecosystems. The new species, Acronichthys maccognoi, shows early ...

An artist's reconstruction of the Weberian apparatus in a 67 million-year-old fossil fish. The Weberian structure (gold-colored bones at center) arose from a rib (shown in gray attached to several ...