Less oxygen in rivers undermines their health, creating more dead zones and suffocating fish ... and Thailand, sustaining the rich fisheries and fertile farmland central to the lives of those along ...

The Chel snakehead fish, declared extinct since 1933, reappeared in a Himalayan river, highlighting the resilience of ...

The specimens were showing up at commercial fish markets as bycatch along with other bottom-dwelling species “caught by ...

In a river of South Africa, a patterned creature with a “sickle shaped” mouth swam through the “dark peat-stained” waters.

In a hard-to-reach cave of northeastern India, a “slender” river creature with “fleshy” lips tucked itself under a rock. A ...

He’s seen a river chub spend days searching for suitable rocks to build a nursery. He’s swum among longnose gar, ancestral fish that he says resemble “underwater dinosaurs,” and watched a ...