5-meter-long (16.4-foot-long) anaconda

Washington Post:

A 66-year-old Brazilian saved his grandson from the grip of a 16-foot-long anaconda (probably Eunectes murinus),by beating the snake with rocks and a knife for half an hour, police said Thursday.

“When I saw the snake wrapped around my grandson’s neck I thought it was going to kill him,” Joaquim Pereira told the Agencia Estado news service. “It was agonizing, I pulled it from one side, but it would come back on the other.”

Pereira’s 8-year-old grandson, Mateus, was attacked by the anaconda near a creek on his grandfather’s ranch in the city of Cosmorama, about 250 miles northwest of Sao Paulo.