The most massive snake is the Green Anaconda (Eunectes murinus). The maximum verified size is 7 m (23 ft) and 250 kg (550 lb), although rumors of larger anacondas persist. The Reticulated Python (Python reticulatus) is longer but much lighter, and can be up to 8.7 m (28 ft).
The largest overall venomous snake is the South American Bushmaster (Lachesis muta), capable of growing 3.65 m (12 ft) long and 8.5 kg (19 lb).
The longest venomous snake is the King Cobra (Ophiophagus hannah), with lengths of up to 5.7 m (18.7 ft), but with a weight of 6 kg (13 lb).
The heaviest venomous snake on record is a captive Eastern Diamondback Rattlesnake (Crotalus adamanteus), which weighed over 12 kg (26 lb).