With razor sharp teeth, armor like scales, and a body that can grow longer than a person is tall, the alligator gar looks ...

When saltwater fish long ago evolved to live in fresh water, many of them also evolved a more sophisticated hearing system, including middle ear bones similar to those in humans. Two-thirds of all ...

Freshwater fish populations that dwell nearer the poles are outperforming their equatorial counterparts, researchers have found. Freshwater fish populations that dwell nearer the poles are ...

The ‘megafish’ living in southeast Asia’s Mekong River once faced extinction. A new rapid response system is helping reverse their dire outlook.

The cancer poses no known health risk to humans.

More than 90% of popular freshwater fish in Southern California are carrying human-infecting parasites, researchers say. This poses a significant danger for those who like to eat freshly caught ...

If you’re a fan of giant fish, you already know about the Mekong River. Now, familiarize yourself with the new record-holder in the largest freshwater fish category: a giant stingray that measures ...

The world’s largest freshwater fish, a 13-foot-long, 661-pound stingray, has been discovered in the Mekong River in Cambodia. Scientists say the animal is a hopeful sign for the river, which faces ...

Health experts have been sounding the alarm about PFAS, human-made toxic chemicals that last so long in the environment and people that they've been called "forever chemicals. The compounds have been ...

Freshwater lakes across North America and Europe have been quietly changing colour for decades and not in a good way. A growing number of rivers, ponds, and lakes are turning a murky tea-brown shade, ...