Piranha
/pɪˈrɑːnə/
Definition 1 of 2
Pro Tip 1/3Cultural Imagery
Piranhas are often seen as vicious due to movies, but not all species are aggressive. 
Piranhas in films are exaggerated; they typically flee rather than attack humans.
Pro Tip 2/3Not Always Dangerous
Despite their reputation, piranhas are not always a threat and attacks on humans are rare. 
Though heavily feared, piranhas seldom pose dangers to swimmers.
Pro Tip 3/3Popular Misconception
Common myths overstate piranhas' danger; they mostly scavenge or prey on smaller fish. 
He believed piranhas could devour a cow, a common misconception about their predatory nature.