Yellow anacondas are ovoviviparous which means the female retains their eggs internally until they hatch, so she bears live young.Yellow anacondas are members of the genus Eunectes meaning ‘good swimmer’. Anacondas are very at home in the water and prefer to attack prey from here, rather than on land. They snatch prey using their powerful jaws and then coil their body around the prey and suffocate or drown it.
Yellow anacondas are solitary animals with the exception of breeding time. Males will follow the pheromone scent given off by a female when she is ready to breed, and will start courtship once they catch up with her. Occasionally more than one male will find the female and they will form a breeding ball around her and compete for breeding rights. Yellow anacondas have been recorded remaining in this breeding ball for up to a month.