Random Trivia For This Title:
- Mike Mignola, creator of the [Hellboy] comic books (and the basis for the movie) provided many initial production sketches for this film. Mignola was initially contacted by a Disney representative asking if he would work on the project, Mignola's first response was "How did you get my phone number?".
- [?] Marc Okrand, who created the Atlantean language, also created the Vulcan and Klingon languages for the [Star Trek] series. The written Atlantean language is to be read left to right, drop down a line, and read right to left, continuing this cycle. It was done to create a flowing, water-like movement reminiscent of the Atlantean culture.
- One of the first Disney films to feature an African American character as an important secondary character.
- Jim Varney (Cookie) died just before finishing the film. The "I ain't so good at speechifying" line near the end is the only line not spoken by Varney. Steven Barr did the voice for that scene.
- After Milo gets seasick on the first ship, his line, "Carrots? Why are there always carrots? I didn't even eat carrots!" was ad-libbed by Michael J. Fox. Ironically Michael J. Fox is allergic to carrots in real life.
- When the surface-dwellers first meet the Atlanteans, the Atlanteans address them in French, Spanish, Italian, Hebrew, German, Greek, Chinese, and Taiwanese. Milo speaks to them in Atlantian, Latin and French.
- Rourke's middle name, Tiberius, could be a possible reference to Captain James Tiberius Kirk from the show [Star Trek], in which Kashekim Nedakh's voice actor Leonard Nimoy played Spock.
- The fish in Whitmore's aquarium are coelocanths. The coelocanth is a sort of "living fossil" in that they were thought to be extinct until specimens were caught in the 1930s, over 20 years after the film is set.
- Kida is the first Disney princess to become a queen within her original film. However, her coronation is not shown onscreen.
- Rourke after meeting Milo for the first time claims he prefers a good Western himself. The character's voice actor James Garner was best known in the late 1950s Western sitcom Maverick.
- Lloyd Bridges was originally cast as Whitmore, but he died shortly after production began. Tim Curry was considered for the role of the King of Atlantis. Tommy Lee Jones, Jack Davenport, and Kurt Russell were considered for the role of Commander Rourke. Nathaniel Parker auditioned for the role of Lyle T. Rourke, his voice didn't suit the character, however [?] Don Hahn was so impressed with his performance he cast him in The Haunted Mansion.