As salmon and steelhead swim upstream, they’re now facing one more challenge in fish ladders. It’s a non-native fish competing for space: the American shad. At Lower Granite Dam on the Lower Snake ...

Exotic fish released as part of a Buddhist religious practice have become the preferred food option for otters, potentially mitigating the impact these introductions have on native species. When you ...

Scientists working to protect the waters of South Dakota from invasive species are calling for people to help out by catching and eating invasive carp—"America's most unwanted fish." Once established ...

Rivers need water -- a fact that may seem ridiculously obvious, but in times of increasing water development, drought, and climate change, the quantity of natural streamflow that remains in river ...

URBANA, Ill. – Rivers split across mountaintops and other geographic barriers may flow only a few miles from one another, but to the aquatic creatures in those waters, the separation could represent ...