When Ohio's Cuyahoga River literally caught fire in 1969, it forced a reckoning that changed federal law forever. Five ...

Once declared dead, Toronto's Don River shows a remarkable ecological comeback. Recent surveys reveal over twenty fish ...

As they swim around, fish leave DNA fragments behind them, for example via their skin or their excrements. Once collected and analyzed, these indicators allow scientists to determine all the species ...

The Colorado has been struggling for decades. This summer could bring it to the brink, threatening endangered wildlife and communities.

A polluted river in Mexico may be scrambling the love lives of two small fish species — so much so that it may be erasing the ...

One-fifth of fish species in the Mekong river face the threat of extinction, according to a new report from a coalition of regional and international environmental groups. The Mekong -- among the ...

Almost a quarter of all freshwater species are threatened with extinction. The removal of human-made barriers from rivers, such as dams and weirs, is a popular way to restore water flow and sediment ...

KINGSTON — Volunteers gathered at Kingston Point Beach on Saturday to see what is really going on in the Hudson River’s brackish waters. The Great Hudson River Estuary Fish Count takes place at ...

The U.S. Fish and Wildlife Service announced Thursday that it is downlisting the razorback sucker from an endangered to a ...

BANGKOK, March 4 (Reuters) - Unsustainable development threatens the health and diverse fish populations of the Mekong river, with one-fifth of fish species in Southeast Asia's main artery facing ...