An anaconda is a large snake found in tropical South America. Although the name applies to a group of snakes, it is often used to refer only to one species in particular, the common or green anaconda, Eunectes murinus, which is the largest snake in the world by weight, and the second longest.
Anaconda may refer to:
Any member of the genus Eunectes, a group of large, aquatic snakes found in South America
Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and Trinidad and Tobago.
Eunectes notaeus, the yellow anaconda, a small species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.
Eunectes deschauenseei, the darkly-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.
Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.
The giant anaconda is a mythical snake of enormous proportions said to be found in South America.
The term was previously applied imprecisely, indicating any large snake that "constricts" its prey (see Constriction) was called anaconda, though this usage is now archaic.