Dec. 25, 2013: A man is treated after he was bit by a palometa, a type of piranha, while wading in the Parana River in Rosario, Argentina. Lifeguards director Federico Cornier said Thursday that thousands of bathers were cooling off from 100 degree temperatures in the Parana River on Wednesday when bathers suddenly came to them complaining of bite marks on their hands and feet. He blamed the attack on palometas, a type of piranha, big, voracious and with sharp teeth that can really bite. (AP/LA CAPITAL) 