Workers in Brazil have captured what could be the largest snake ever. The beast measuring 33-ft and weighing 400kg was found by construction workers following an explosion in a cave in Altamira, ParĂ¡. A video filmed by one of the workers shows the sheer size of the enormous reptile. The Guinness World Record for the longest snake in captivity is currently held by Medusa, a snake in Kansas City, US, which measures 25 ft 2in long.