Large specimens attain 14- to 16-foot lengths and weigh 150 to 180 pounds. The maximum length of this species slightly exceeds 33 feet.

Range: The species occurs in Colombia, Venezuela, Guyana, Surinam, French Guiana, Brazil and Bolivia.

Habitats range from the extensive drainage areas of both the Orinoco and the Amazon Rivers.

Captive green anacondas do best when given water containers in which to soak and swim, it is important to remember that the size of the water container will need to increase to accommodate the growing anaconda.

The majority of green anacondas are fierce biters and do not have suitable temperaments to be kept as captives. They are not recommended as captive pets to anyone but experienced keepers with quick reflexes and lots of cage space.