An effective date or as of date is the date upon which something is considered to take effect. This may be different from the date upon which the event actually occurs or is recorded.
The Eunectes Four. Four species of semiaquatic South American boas go by the name of anaconda. One is the green anaconda (Eunectes murinus), which occurs in countries such as Brazil, Bolivia, Peru, Ecuador, French Guiana, Guyana, Colombia, Venezuela and the island of Trinidad. The yellow anaconda (E. notaeus) is the only other Eunectes species commonly seen in the pet trade.
Quick Answer. The green anaconda is considered to be one of the largest species of snakes in the world, with some specimens reaching 29 feet in length and weighing as much as 550 pounds. Although reticulated pythons can grow longer, experts contend that the green anaconda is significantly heavier.