People have been catching some huge catfish on the Potomac River, fishing from the bank downriver from Georgetown, where the Rock Creek meets the Potomac. Blue catfish have been caught that are three to four feet in length occasionally, and channel catfish, brown catfish, and some hugebull heads are also easy to catch.
The river reportedly contains Bass; Smallmouth, Largemouth, and Striped Bass are sometimes caught in different areas of the river. White Perch are common, and of course abundant Bluegill (our native Bream) also populate the river.
Striped bass can become huge, about 20-40 lbs is not unusual in the Potomac, and are usually caught from boats by anglers fishing the deep water of the Potomac, sometimes above the Key Bridge.