Millicent Patrick was a commercial artist, fashion designer and illustrator of children’s books. Patrick began working at Walt Disney Studios in ink and paint department, the next year she was moved to the animation and effects department, where she became one of the first female animators at Disney. She also worked in Fantasia, Dumbo (1941). She designed the Gill-man creature for the film The Creature of the Black Lagoon (1953).
Source: www.wikipedia.org