In the Goblet of Fire movie Nagini is animated to be a Burmese Python, essentially. In the later movies Nagini is portrayed as being identical to a Reticulated Python. … Every snake in both the books and the movies are depicted as constrictors.

Was Nagini a real snake?

As mentioned earlier, Nagini’s venom is an iconic facet of her character. This means that Nagini took the form of no known real-world snake. Perhaps this species, with its magical poison, is a fantastic beast that appears only in the wizarding world.

Is Nagini a basilisk?

Nagini is one of many snakes featured in the series

After all, the great Basilisk in the Chamber of Secrets was a huge snake, bred with Salazar Slytherin’s intent to murder Muggle-borns.

Nagini, it turns out, was actually a Maledictus—a witch with a blood curse that turns her permanently into a beast (in her case, a giant snake). In the film, the witch is played by Claudia Kim.