It starts as a calm day of fishing until a piranha shows up hungry. The moment it attacks is fast, vicious, and unbelievable. Watch the raw power of one of the most feared fish in action.

The video examines the long-standing fear that piranhas can devour a human. It breaks down how these fish actually behave in the wild and what triggers their aggression. Viewers learn why most ...

NEWTON, Iowa — The 3-pound, 16-inch fish pulled from the lake at the Jacob Krumm Nature Preserve last week had big teeth. "My kids knew what I had before I did," said angler Tim Merical, of Grinnell. ...