giant anacondas date back as far as the European colonization of South America, when sightings ofanacondas upwards of 50 meters (164 feet) began to circulate amongst colonists, and the topic has been a subject of debate ever since among cryptozoologists and zoologists. In 2009 the discovery of Titanoboa fossils found in South America show snakes In the past did reach sizes of over 40ft leading some to believe the Giant Anaconda is a distant relative. Anacondas can grow to sizes of 5.21 metres (17.1 ft), and 97.5 kilograms (215 lbs.) in weight. Although somepython species can grow longer, the anaconda, particularly the green or common anaconda, is the heaviest and largest in terms of diameter of all snakes, and it is the second-longest extant snake in the world behind the reticulated python.The longest reputably-measured and confirmed anacondas are about 5.21 metres (17.1 feet) long. Lengths of 50–60 feet have been reported for this species, but such extremes lack verification. The only real reliable claims that can be found describe measured anacondas ranging from 26 to 39 feet, although these remain unverified.