The super invasive rusty crayfish, sometimes called a gladiator, has been slowly taking over several waterways in Pennsylvania.
The crayfish were transported to Pennsylvania from their native range in the midwest more than 50 years ago when they were used as fishing bait.
“When folks were done fishing with their bait, they would release their extra crayfish that they had,” said Sean Hartzell, aquatic invasive species coordinator for Pennsylvania Fish and Boat Commission…