The king cobra (Ophiophagus hannah) is a species complex of snakes endemic to Asia. With an average length of 3.18 to 4 m (10.4 to 13.1 ft) and a record length of 5.85 m (19.2 ft), [2] it is the world's longest venomous snake and among the heaviest. Everything you should know about the Cobra . The Cobra is a venemous snake that rears upwards and flattens its neck into a hood when threatened. King cobras can reach 18 feet in length, making them the longest of all venomous snakes . Although zoologist Theodore Cantor first described the king cobra as one species in 1836, the snakes ... About Cobra Snake Etymologically the word cobra is derived from the Portuguese ‘ cobra de capello’ which connotes ‘hooded snake ’. Even a lay man without any specific knowledge about snakes or reptiles can recognize a cobra for their prideful stance and elegance. This is because Cobra belongs to the family of elapid snakes , most of which belong to the genus Naja. Elapidae is a family of venomous snakes which display the most distinguishing of snake poses, not only the ones used in ...