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Flathead catfish becomes top predator of the Susquehanna River, eating fish 20 inches long

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 ...
Popular Science

Monster catfish and its creepy smile invade PA rivers

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Flathead catfish (Pylodictis olivaris) may look like they are ...