Very simple, someone sees a baby pike buys it and puts it in a twenty gallon with cardinals and rasbora's. soon the tetras disapear they witness the pike eating. sells (or kills) the pike and spreads the word saying that pikes kill other fish! they warn the store staff and gets mad at him for selling him a "bad" fish. to avoid this again the staff doesnt recomend pikes to any one and soon the story is widespread. then someone gets a really aggresive pike (e.g. Cr. comprissceps ect.) and that story is widespread too. and it spreads.
Hudson

Hudson

