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.
Green Anaconda. With an average length of 6 m (20 ft.) and a top length of 8.8 m (29 ft.) the green anaconda is one of the longest snakes in the world. The green anaconda, with a girth of nearly 30 cm (12 in.) and a weight of 227 kg (550 lb.), is the heaviest of all snakes.