The entire Pixer staff that was working on movie "Finding Nemo" had to take a garduate class in Fish Biology before making any character in the movie "Finding Nemo".
The Beast, from the movie "Beauty and the Beast" is a chimera with the head of a buffalo, eyebrows of a gorilla, body of a bear, jaws and mane of a lion, tusks of a boar, and legs and tail of a wolf.
If you arrange the first letters of each of the main character's names in movie "Inception" -- You would get word DREAMS on which the whole movie is based.