Heaviest - The giant anaconda, or great water boa (Eunectus Murinus), can be almost twice as heavy as a reticulated python (Python reticulatus) of the same length. A female shot in Brazil c. 1960 was not weighed but, as it measured 27 ft 9 in in length with a girth of 44 in, it must have scaled nearly 500 lb. This specimen was captured near the Xingu River, Brazil by members of the Suia tribe. (Photo: ZEFA)
