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 ...

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 ...

Flatheads grow fast in this river system, attain large body sizes and can eat a variety of prey. Because adult flatheads have few natural predators, they can exert strong control over the ecosystem.