Anyway, the casting and filming were a logistical train wreck speeding toward a pit of nonsense. After some literal witchcraft was employed by the film's director, Marlon Brando agreed to take the titular role, but with some conditions. For an overwhelming majority of the production, Brando would meet with the director, lead writer, and a two-foot-tall extra he'd met on set to discuss changes he'd like to make to the film.
Some of Brando's changes made it in, such as Moreau's bizarre costume and white face paint, and a more prominent role for the two-foot-tall extra. Others did not, such as the huge script revision in which, rather than be murdered by his human-animal hybrids, Moreau would have dramatically revealed that he was secretly half man, half dolphin the whole time. That is in no way a joke.
New Line Cinema
They also wanted to reveal his hat as a half KFC bucket, half Monopoly thimble hybrid.
Brando had a pretty elaborate setup, too. Moreau was to wear a big, floppy old lady hat, which the audience would mistake for another piece of eccentricity, but which would actually be hiding his telltale blowhole. Moreau would eventually whip the hat off, revealing his true dolphin nature, and the movie would've imploded in a much more entertaining fashion than it eventually did.
So if there are any actors out there who want to test how much influence they have in their films, know that "My character is secretly a dolphin" is the brass ring.