If they have the ability to overpower it, they’ll eat large fish, birds, rodents (Capybaras) and other reptiles. Since green anacondas are primarily aquatic snakes, they’’ feed on a wide variety of prey. Green anacondas are very solitary snakes and prefer to be on their own most of their lifespan. They are also known to bury or burrow in mud patches, and they’ll go dormant just resting in the piles of mud. They are known to “float” at the surface of the water, where their snout is only visible. These snakes are pretty nocturnal, so they spend the majority of their day swimming in the water. The anaconda's jaw bones are loosely connected which allows them to open their jaws such a wide distance in order to swallow prey larger than their heads. Their eyes are set high on the head which allows the snake to see out of the water while swimming without exposing its full body.

They have very narrow heads compared to their body size. Green anacondas have a beautiful color pattern with an olive green background overlaid with black design or patches along the body. A member of the Boidae family of snakes, their scientific name Eunectes comes from the Greek word for “good swimmer” The green anaconda (Eunectes murinus), also goes by a few different names including the giant anaconda, common anaconda, or common water boa.