Joaquim Aranha dos Santos is a Portuguese-born American storyboard artist, designer, director, producer, and writer.

He is best known for his directing work on the television series Justice League Unlimited, Avatar: The Last Airbender, G.I.

He was a storyboard artist for the animated series Justice League before being promoted in the show's renamed third season.

Animation, where he directed two DC Showcase short films: The Spectre (accompanying the Justice League: Crisis on Two Earths direct-to-video movie) and Jonah Hex (on Batman: Under the Red Hood).

He also worked as an executive producer and co-showrunner on the animated series Voltron: Legendary Defender with Lauren Montgomery.