In less than 25 years, an invasive fish has become the apex predator of the Susquehanna River in eastern Pennsylvania. Flathead catfish have been flourishing in the river since 2002, growing to 30 to ...

NORTHUMBERLAND COUNTY, Pa. — Kury Point in Shikellamy State Park served as the backdrop on Wednesday as state agencies dedicated the new fish passage. The fish passage located at the park's Adam T.

Flathead catfish, opportunistic predators native to the Mississippi River basin, have the potential to decimate native and recreational fisheries, disrupting ecosystems in rivers where they become ...

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.