1. The fish that says “Oh my gosh! Nemo’s swimming out to sea!” is named Kathy:
2. The reason the name on the diver’s goggles is P. Sherman is due to the fact that a large part of the film’s crew was Filipino, and “fisherman” apparently sounds a lot like “P. Sherman” in a Filipino accent:
3. If you zoom in close enough at the dentist’s office, you can read the diplomas. Here’s what they say:
4. The movie originally didn’t start out so sad. The death of Nemo’s mother was told through flashbacks, instead. However, the animators changed this because they “wanted the viewers to understand the overprotective nature of Marlin” from the start.
5. The actor who plays Shane Botwin from “Weeds” is the voice of Nemo:
Strangely enough, Nemo’s mother is voiced by the actress who played Celia on “Weeds” and his father, Marlin, by Shane’s grandfather on the show.
6. Pixar has a habit of referencing older Pixar films in their movies. Here’s Buzz Lightyear on the floor of the dentist office:
7. And a kid in the dentist’s office reading a Mr. Incredible comic book:
8. Nemo actually appeared in Monster’s Inc as one of Boo’s toys, two years before “Finding Nemo” was released:
9. If you look closely at the end of “Finding Nemo”, you can see Luigi from “Cars,” which would be released three years later:
10. There’s some debate as to whether this poster of a large mouse on a fork near the bathroom in the dentist’s office is a reference to “Ratatouille,” which would come out 4 years later:
11. And of course, like every other Pixar film, the Pizza Planet truck makes a cameo:
12. The diver’s camera reads “A113,” which is a reference to a room used by the animation department at CalArts - alma mater of a large number of Pixarians:
It appears in every Pixar film, much like the Pizza Planet truck.
13. Dory’s nosebleed in the Bruce scene was the first time blood was shown in a Pixar movie:
14. Speaking of Bruce, the great white shark was named after what Steven Spielberg called the mechanical shark in “Jaws:”
15. Several times in the film, the characters say the line “all drains lead to the ocean.” Since water often undergoes treatment before reaching the ocean, the JWC Environmental company joked that “a more realistic title for the movie is “Grinding Nemo.”
16. The three tiki heads in the fish tank are actually modeled after three pixar employees, Peter Sohn, Nelson Bohol and Ricky Nierva:
17. The seagulls (“Mine!”) in “Finding Nemo” are modelled after the evil penguin from the “Wallace and Gromit” short “The Wrong Trousers.”
18. The scene where Dory and Marlin need to go through the Jellyfish colony contains 74,472 jellyfish, and upwards of 8,000 in any single shot:
Additionally “it took a total of 361,975 feathers to cover all 7 pelicans in the film” and 200 turtles to fill the turtle riding scene.
20. Megan Mullally (“Will & Grace,” ‘Party Down,” “Parks & Rec”) originally had a part in the film, but was fired from the film after she refused to do the high pitched voice her character Karen on “Will & Grace” did.
The producers had no idea that wasn’t her natural speaking voice.