Snakehead fish — headed this way?

Snakehead fish — headed this way?: "DELAWARE RIVER — Snakehead fish, which have become famous for their aggressive behavior, sharp teeth and ability to maneuver on dry land, have been spotted in waters in Philadelphia, PA. The exotic Asian fish first showed up in a pond in Maryland in 2002. By 2004, the fish were found in Meadow Lake, a tidal pond at Philadelphia’s FDR Park. From there, they have moved into the Schuylkill and Delaware Rivers."