Avatar: The Last Airbender
The sand shark from which Korra and Asami flee in episode 10 is based on the sarcastic fringehead, a small fish found in the Pacific. For reasons of time, the designers re-used the design for Zuko and Iroh's apartment in Ba Sing Se from "Avatar: The Last Airbender" for the apartment of Mako and Bolin's family in episode 11. Another concept taken from the previous series, although not depicted there, was the notion of "becoming wind" as a high-level airbending form, which was included in the series bible of "Avatar".