While in the Xanth sequence by Piers Anthony, the Naga can be a race of human-headed serpents that could change in between fully human and serpent varieties, like any species and dimension of snake. Within the 1998 movie Jungle Boy, the Naga is depicted as a sizable cobra deity https://griffinznyka.worldblogged.com/35680964/23naga-no-further-a-mystery