The Northern Snakehead, a predatory and invasive fish, has been spotted again in the Schuylkill River, this time near Black Rock Sanctuary in Chester County.

Florida wants you to kill as many of the invasive Burmese pythons as you can during the 10-days contest in July. But you can't shoot them.

The murky depths of the mighty river seems to function as refuges for some of the biggest freshwater fish on Earth, explorers are finding.