Two of the large research rafts are shown pulled up to a beach along the Colorado River in the Grand Canyon. Researchers took three years, visiting the river four times a year, to collect data on the ...

A study found flatheads occupy the highest level in the food web, forcing native species like smallmouth bass to change their diets. The invasive catfish are growing much faster and larger in the ...

Flathead catfish are rapidly reshaping the Susquehanna River’s ecosystem. Once introduced, these voracious predators climbed to the top of the food chain, forcing native fish like channel catfish and ...