Back in the 70's a friend of mine used to keep piranha in his aquarium in his apartment in Lackawanna. Well they died, so he put them in the freezer. Being a clown he thaws them out and takes them down to the Buffalo small boat harbor and calls the paper. Says he just caught a piranha with a rod and reel-the paper[i guess Buffalo evening news] runs this big time. Front page, with many biologists giving their thoughts of why piranhas Had gotten to lake Erie, and how it made sense to them.
Week later the lab says"by the way, that was a frozen fish"