Pixar's characters are often planned years in advance. Nemo first appeared as a stuffed toy on a couch in Boo's room in Monsters, Inc. (2001). This movie introduces the main characters of post-2003 Pixar films. A boy in the dentist's office is reading a "Mr. Incredible" comic book, anticipating The Incredibles (2004). Luigi the car is driving by the dentist's office, anticipating Cars (2006).
Andrew Stanton pitched his idea and story to Pixar head John Lasseter in an hour-long session, using elaborate visual aids and character voices. At the end of it, an exhausted Stanton asked Lasseter what he thought, to which Lasseter replied, "You had me at 'fish.'"
Director Andrew Stanton did the voice of Crush the sea turtle. Stanton never intended to do the voice of Crush, only providing the voice for the film's rough cut, but when it proved popular in test screenings, he decided to do it for the final film. Stanton recorded all of Crush's dialogue lying on his couch in his office.
Director Andrew Stanton originally planned to reveal the fate of Marlin's wife gradually through flashbacks, seen periodically as the story unfolded. After a few early in-house screenings, he found that Marlin came off as too much of a worrywart, and decided to reveal the entire back-story up front, thus making Marlin more appealing by establishing the reason for his over-protectiveness. This idea would eventually be used in the film's sequel Finding Dory (2016), where Dory starts to have flashbacks about her family, and starts to remember who she is.
The look and feel of the underwater world was essential to the film's success. To that end, the production crew were all exposed to visits to aquariums, diving stints in Monterey and Hawaii, study sessions in front of Pixar's own 25-gallon fish tank and even a series of in-house lectures from an ichthyologist (the branch of zoology that deals with fish).
Dory does get Nemo's name right a total of seven times, four of them without being corrected first. Of course, some of these times are in quick succession. She also calls him Chico, Fabio, Bingo, Harpo, and Elmo, in that order.
Nemo's father Marlin was originally voiced by William H. Macy. According to James B. Stewart's book "DisneyWar," it was after seeing an early cut of the film with Macy's voice that then-Disney CEO Michael Eisner infamously told his board of directors, "This will be a reality check for those guys...It's OK, but nowhere near as good as their previous films. Of course, they think it's great. Trust me, it's not." Director Andrew Stanton recast the role of Marlin with Albert Brooks, and the film went on to get some of Pixar's best reviews ever and become the highest-grossing animated film of all-time. Even worse for Eisner, Disney's distribution contract with Pixar was close to expiring at this time and thus he was facing a difficult position of trying to renew it with Pixar's owner, Steve Jobs, who already loathed Eisner before that insult. That situation of Disney in danger of losing their most consistently successful producer of films because of Eisner's denigration proved to be one of the numerous complaints about him to finally prompt the shareholders to fire him.
Rendering a frame (at a resolution of 1600x900), which lasted about 1/24th of a second, in the film, could take up to four days because of the complexity of the underwater environment, with sunlight coming through the water and hitting fish scales.
Film makers were worried that comedian Ellen DeGeneres would not be able to perform the dramatic scene where Dory begs Marlin not to leave, so, at the end of a day of recording other scenes, they asked her to record a trial reading of the scene, with the intention that she go home with a recording of it to work on her actual performance. DeGeneres agreed, but her trial reading was so heartfelt and emotional that (apart from a few small edits) this is what was used in the final cut of the film.
SERIES TRADEMARK: When Gil is thinking ahead about how he and the fish will escape, as the camera pans toward and out the window, the Pizza Planet truck from Toy Story (1995) can be seen on the outside. This is the first film where the Truck has a Distinctive Appearance, being a Right Handed Vehicle driving on the left side of the road, since it's in Sydney, Australia.
Crush's son Squirt is voiced by Nicholas Bird, the young son fellow Pixar director Brad Bird. Director Andrew Stanton was inspired to cast Nicholas when Brad was showing home movies around the Pixar offices.
To see how realistic they could make it appear, the art team was asked to make exact copies of actual underwater and above-water shots. Ultimately, the results were simply deemed "too realistic" for a cartoon.
Demand for tropical fish exploded right after the film's release, especially for clown fish and blue tang, the main characters' species. And just like Darla, many new pet buyers had no idea how to take care of their pets and ended up killing them. It was later revealed that saltwater tropical fish need a 30-gallon aquarium with carefully controlled salinity levels, as anything less will kill them. The rise in demand took fish importers by surprise and the population of clown fish dropped by 75 percent in some areas. Although this isn't the first time something like this happened, Finding Nemo was different because this time, the whole premise of the movie was freeing the animal from being a pet. Then again, pet owners who took that premise to heart did not respond much better. Some released their venomous fish into the ocean, ruining Florida's ecological balance. Others flushed fish down the toilet to free them and these fish died before even reaching the sewers.
Though never mentioned in the film, it is revealed by the directors in the commentary that Crush and his crew of thrill-seeking turtles are headed for Hawaii. Also mentioned in the commentary is that the young turtles' shells are modeled after Hawaiian shirts.
SERIES TRADEMARK: Among the toys in the waiting room are the jack-in-the-box and Buzz Lightyear and, on a shelf, the plane he used to "fly" in Toy Story (1995) and Pixar's trademark ball from Luxo Jr. (1986).
Per the DVD extras, Albert Brooks spent an entire day in the recording studio improvising badly mangled versions of the anemone joke; no two tellings were fumbled in the same way. He had the recording technicians in stitches for the duration.
Albert Brooks was always Andrew Stanton's first choice to voice the part of Marlin. Although Brooks had done several episodes of The Simpsons (1989), he found voice work for a feature length cartoon to be substantially different in that he had to do it in isolation, and not alongside any other actors. He didn't particularly enjoy the experience.
SERIES TRADEMARK: The dentist's camera's model number is A-113, a number which appears in all Pixar movies as a reference to the California Arts University room, where the animators of Pixar Studios attend.
According to the DVD, the names of the nine boats seen in the Sydney harbor are: Sea Monkey, Major Plot Point, Bow Movement, iBoat (a reference to iTunes by Apple, the company created by Pixar CEO Steve Jobs), Knottie Buoy, For the Birds (2000), Pier Pressure, Skiff-A-Dee-Doo-Dah (a reference to Song of the South (1946)'s most famous song "Zip-a-Dee-Doo-Dah"), and The Surly Mermaid.
Megan Mullally revealed that she was originally doing a voice in the film. According to Mullally, the producers were quite disappointed to learn that the voice of her character Karen Walker on the television show Will & Grace (1998) wasn't her natural speaking voice. The producers hired her anyway, and then strongly encouraged her to use her Karen Walker voice for the role. When Mullally refused, she was fired.
In the original cut of the movie, the whale that swallows Marlin and Dory approaches them from the front. This version of the scene appeared in an early trailer. The final version, with the whale coming from behind, was inspired by an early animation test showing a whale emerging from the murk of the ocean behind a small fish.
Most of the fish are actual saltwater fish that can be found in the pacific ocean. Nemo is a clownfish (so is Marlin), Dory is a Regal Blue Tang, Gil is a Moorish Idol, Bloat is a Porcupine Puffer Fish, Bubbles is a Yellow Tang, Peach is an Ochre Starfish, Gurgle is a Royal Gramma, Jacques is a Cleaner Shrimp, and Deb is a Damsel Fish.
According to the DVD, there are some references to Massachusetts in the film as one of the creators is from Rockport, Massachussetts. While various sea creatures are relating Marlin's quest across the ocean, one step is a group of lobsters that speak with Boston accents and slang ("wicked daahhk").
Two experiences in Andrew Stanton's life shaped the film. The first one was recalling trips to the dentist as a child and being fascinated by the aquarium there, the second was realizing that he was naturally over-protective of his young son.
Last of the 3 Consecutive Pixar Films to have Lee Unkrich as the Co-Director. He wouldn't be able to direct another Pixar Film until Toy Story 3 (2010)_ and Coco (2017) 7 and 14 years later respectively as the Main Director.
In the scene where the silver fish are playing charades with Dory, one of the shapes is that of an old ship. The fish are whistling "Whale of a Tale", which was sung by Kirk Douglas in the beginning of the 1954 Disney movie, 20,000 Leagues Under the Sea (1954). The submarine captain in that movie was named "Nemo".
The scene were Nigel evades a group of seagulls by narrowly passing between the mast and mainsail of a yacht recalls a similar scene in Star Wars: Episode V - The Empire Strikes Back (1980). In that movie, Harrison Ford's character Han Solo flies his ship, the Millennium Falcon, through a narrow canyon in order to evade the pursuit of a group of TIE fighters. In both instances, the hero, at the last instant, rolls 90° and flies through the opening, while his pursuers hit the surrounding walls (or sails in the case of the seagulls).
The first Pixar film to win the Oscar for Best Animated Feature. Toy Story (1995), A Bug's Life (1998), and Toy Story 2 (1999) all came out before the award was introduced, and Monsters, Inc. (2001) lost to Shrek (2001).
To see Buzz Lightyear in Finding Nemo (2003), you won't even have to press pause. But you probably didn't see the plane Buzz was flying on in Toy Story (1995). This is a reference to the scene from Toy Story (1995) where Buzz was flying on the plane hanging on the ceiling.
Dory's species is known by several common names, including, regal tang, palette surgeonfish, blue tang, royal blue tang, hippo tang, flagtail surgeonfish, Pacific regal blue tang, and blue surgeonfish.
The nicknames Dory gave to Nemo (in order of appearance) are Chico, Fabio, Bingo, Harpo, and Elmo. The first four are a reference to the Marx Brothers (excluding Groucho), while the fifth is a reference to the red Muppet monster from the children's puppet show Sesame Street.
During the scene in which Bruce tries to ram a door in the submarine is a reference to the film Deep Blue Sea (1999) featuring three mako sharks. One of them attempts to ram two doors open and rip a hole in a submerged chain-link fence.
It is unknown what Bruce's opinion on dolphins is. He may be the kind that does not mind dolphins, as long as they do not bother him. While Anchor and Chum were making fun of dolphins, Bruce did not say anything; he just called the meeting to order. Ironically, great whites are one of the few sharks who are known to hunt and eat dolphins, excluding Orcas.
While many fans of Finding Nemo (2003) believe Bruce to be a villain, he actually is not, since he was nice to Marlin and Dory, and never showed any signs of true evil, aside from his natural predatory instincts taking over him after smelling Dory's blood.
Peach appears to have eyes and a mouth. In real life, starfish do not have faces like vertebrate animals. This was done to accompany the fact that the film is set through the perspective of Marine Life.
Gill's species, Moorish Idols, are notoriously difficult to keep in captivity due to their diet and mannerisms. This may be an interesting way to show Gill's deep desire for escape from the aquarium and into the ocean. In addition, Gill was pressuring Nemo to follow his challenging orders on his escape plan.
There is a deleted scene as an extra in the Audio-Visual Commentary on the DVD, wherein Gill says that he has brothers and sisters named Marco, Polo, Lester, Linus, and Lulu. He also tells Nemo that he is from a place called Bad Luck Bay, a "rough part of the ocean" that is "shaped like a human's skull." Later, on a program comes on TV, where a man reads a book to his child about Marco, Polo, Lester, Linus, and Lulu's adventures in Bad Luck Bay, and Nemo finds out that Gill was lying to him.
Like all pufferfish, Bloat sucks water into a compartment in his stomach to inflate, and also like many pufferfish in real life, Bloat often has trouble deflating. Also worth noting Bloat doesn't have the chameleon-like eyes and color-changing abilities that real pufferfish do.
Before Vicki Lewis voiced Deb The Damselfish, she played Dr. Else Chapman the Paleontologist in the Live Action sci-fi film Godzilla (1998). At least she wasn't eaten because Godzilla (1998) eats tons of Fish.
When the fish start bashing the AquaScum 2003 for foiling their escape plan before Dr. Sherman scoops Nemo out of the tank, Gurgle appears to hate the AquaScum the most, with him swimming up to it and yelling, "CURSE YOU, AQUASCUM!!!" Ironically, after Gurgle yelled, "CURSE YOU, AQUASCUM!!!" his wish that the AquaScum filter would break down came true at the end of the movie when he and the rest of the Tank Gang escaped to freedom. Also, it would contrast on his phobia on germs that the AquaScum 2003 cleans the tank and his doubts about escaping the tank.
According to the Guinness Book of World Records, sea turtles can actually live up to 152 years. This contradicts what Crush said about still being young at age 150, it could be possible that he feels young instead of literally young.
Darla, in a way, is very similar to Sid Phillips, as they are both naughty human children who serve as antagonists towards the main character's races (toys and fish, respectively), although while Sid is a genuinely nasty child (in the first Toy Story (1995)) who relishes in his sick experiments, Darla appears to be much more innocent and seemingly did not mean Chuckles and Nemo any real harm, and apparently genuinely caring for Nemo (evidenced by her calling out to Nemo when he went down the drain). Unlike Sid though, Darla does not learn any lesson.
One of Finding Nemo's crew members, head shader Robin Cooper, took photos inside a dead, beached gray whale in order to portray the inside of the whale accurately. In addition, while whales' mouths and blowholes aren't connected, director Andrew Stanton had to "defy reality" in order to move the plot, as the other ways that Marlin and Dory could escape from the whale weren't appetizing.
In reality, clownfish are protandrous hermaphrodites they are born male but change sex later in life so whenever a female clown fish within a school of fish dies, a male will change gender to make up for the death and mate with the other male, if the movie had been more accurate in nature Marlin would have become a female shortly after his wife's death which would have made him Nemo's mother not his father.
In the Finding Nemo essential guide sticker book, it is hinted that Chum hangs out with at least three different groups of sharks the first is the obviously FEA which includes Bruce and Anchor the second is a group of tough sharks that gave him the nickname "snaggletooth" in the third is a group that includes posh sharks and refers to the former two groups as a "reef raff".
Blue whales have black baleen plates and tend to be larger. And while the whale has a uvula hanging above his soft palate, whales don't have uvulas at all, however this wasn an intentional mistake by Andrew Stanton as he thought audiences would see that Marlin and Dory were inside the whales mouth if it had a uvula as "stage dressing".
The trivia items below may give away important plot points.
Afraid that kids would try releasing their pet fish by flushing them down a drain, a company that manufactures equipment used by water filtration and sewage treatment plants released a warning the Thursday after the film came out, saying that, even though drains do eventually reach the ocean, before it got there, the water would go through equipment, which breaks down solids, and went on to say that in real life, the movie would more appropriately be called "Grinding Nemo."
The pre-end credit scene show all the aquarium fish from the dentist's office are free and out of their plastic bags. As the closing credits are about to end, there was a short segment where the angler fish swims up to the tiny green fish and the tiny fish opens its mouth and swallows the angler fish.
The first Pixar Film to show blood (not counting A Bug's Life (1998) where it was only a sample as opposed to someone bleeding from an injury), as well as the only G Rated Film of Pixar's to have it shown. It was shown where Dory got hit in the face by a scuba mask when she was trying to show it to the sharks and read what the mask says, but Marlin refuses to have the mask be shown and he pulls it but Dory pulls back, and Marlin accidentally gave Dory a nosebleed after letting go of the mask.