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

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

A sweeping global report finds that migratory freshwater fish are in steep decline, with populations down roughly 81% since 1970. These species depend on long, connected rivers, but dams and human ...

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 ...

More than 300 new species of freshwater fish were identified around the world by scientists last year, the third most in a year since 1758. ● Tampa Bay is facing one of its worst water shortages in ...

At a maximum depth of 1,158 feet and 43 miles from tip to glacially carved tip, that’s a lot of deep blue space for a monster ...

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 ...