More to Do to Clean Up the Potomac River Stormwater runoff from urban and suburban areas is the major, fastest-growing culprit today polluting the Potomac River.

A bull shark… in a river?! We never expected to find one, but while exploring, we came across this powerful predator in unexpected waters.

Bull sharks (Carcharhinus Leucas) are one of the ocean’s most fearsome creatures. Although some animals may prey on bull sharks, such as crocodiles, killer whales, and the occasional great white ...

There's a recurrent rumor that bull sharks live in the Ohio River near Cincinnati. That's almost certainly not true.

What would you do if an eight-foot-long bull shark rammed your kayak while you were fishing in the open ocean? Fisherman Quentin Turko managed to stay afloat during his frightening encounter off ...

The Potomac River Report Card presents and assesses data on five significant river health indicators: pollution, fish, habitat, land, and people.

Do bull sharks swim in rivers? It’s not clear if the fin a South Jersey kayaker spotted in a river Sunday was attached to a bull shark, but the species is known to move into brackish river water.

Crystal River is famous for its manatees, when hundreds flock snout to snout in the warm waters of Three Sisters Spring during winter cold snaps. But there's also a key species hiding in its ...

Baby bull sharks are thriving in the rising coastal ocean temperatures in the Gulf of Mexico in Texas, according to a report.

Baby bull sharks have been found in the Alabama River, 75 miles north of the ocean, and up the Mississippi River as far as Illinois.

Baby bull sharks have been found in the Alabama River, 75 miles north of the ocean, and up the Mississippi River as far as Illinois.