The size of an Anaconda can range between 15 and 35 feet, with an average of 25 feet.
Anacondas can grow to sizes of 6 meters (20 ft) and beyond, and up to 150 kilograms (330 lbs.) in weight. Although some python 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 8 metres (25 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. A large specimen was measured in Columbia in 1978 which was over 24 feet long and weighed over 300 pounds.
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anaconda
India
In Venezuela, a 40 ft 720 lb green anaconda was found!
definitely a green anaconda
The Green Anaconda is 25 ft long and 1 ft wide and tall.
south America
The anaconda which can grow up to 32 ft. long.
Anaconda.
The green Anaconda
The yellow anaconda is 10 to 15 ft long.