Image Source Common Name: Common anaconda, green anaconda, or common water boa Scientific Name: Eunectes murinus Life Span: 10 to 20 years Mass: 550 pounds to 1,100 pounds Length: Males: 9 or 10 feetFemales: 16 feet Size: 5 meters to 36 meters Habitat: Swamps, marshes, and streams Country of Origin: South America Physical Description