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 ...
In rivers that once held a balanced mix of native fish, a giant predator now dominates so completely that it has started ...
Have you ever seen a fish eat a bird? Probably not, but that’s exactly what the Wels catfish is capable of doing. This video from BBC Earth shows a Wels catfish eating a pigeon whole. This astonishing ...