Water tanks line a room in Philadelphia’s Water Works on the bank of the Schuylkill River. Inside are small fish that are hosts to tiny organisms that researchers say can help solve polluted waterways ...

Quagga mussels reproduce rapidly and are capable of clogging pipes, which poses a risk for drinking water and agriculture.

For the first time in more than a century, salmon are swimming freely along the Klamath River and its tributaries — a major ...

Salmon and tuna are popular and delicious fish. Is one healthier? Dietitians break down salmon vs. tuna nutrition and health ...

In the mountainous farmland of southern China, a cave is nestled between fields of maize, wheat and potatoes. It is the only ...

A group of whistleblowers and PETA are taking aim at the East Idaho Aquarium for alleged animal abuse at its facility and thousands of deaths.

Of the Atlantic killifish studied, findings showed gene expression changes in the unevolved population and – contrary to what ...

The Soviet Navy's K-222 submarine, also known as the Papa-Class or as the "Golden Fish," was the first submarine to feature a ...

England's Atlantic salmon population has sunk to a record low, the latest indicator that its marine and freshwater ecosystems ...

You don't have to look to outer space to find creatures that are nothing like you would expect to find on Earth. The fish that live and lurk in deep ocean waters almost defy explanation. In fact, ...

The longfin smelt, a 4-inch fish once so abundant it was commercially fished, is now endangered and needs protection in ...