Marlin

Marlin is the main protagonist in the Disney/Pixar 2003 film Finding Nemo and will apparently be the deuteragonist in its sequel. He was voiced by Albert Brooks.

Background
Marlin is a clownfish who makes his home inside a sea anemone in the Great Barrier Reef. He once had a wife Coral who died in a barracuda attack, along with almost all of his children. Also as a result of the attack, he has one son, Nemo.

Marlin can be somewhat overprotective of Nemo. He also tends to be neurotic, worrisome and pessimistic believing Nemo can't swim well when he actually can. However, this does not stop him from going on a journey to find his lost son, proving his determination.

Personality
Marlin was initially a very playful, happy, easygoing man, as shown through the interaction with his wife. He was shown to be slightly lazy, as he wanted to name half of his children Marlin Jr. and the other half of his children Coral Jr. However, he was also shown to be very brave, as he attempted to defend his wife against the barracuda who sought to eat his children and his wife, but was ultimately repelled and knocked unconscious and into the sea anemone before he could do anything. This protected him, but also cost him his entire family, with the exception of Nemo, who was left with a crack in his egg, which could have caused his "lucky fin".

From this moment on, Marlin became overprotective, neurotic, paranoid, worrisome, and pessimistic, as he made several practices and conditions for Nemo and himself to follow to make sure they were protected and safe. He became paranoid and neurotic about any potential danger that could occur to Nemo and as such rarely left Nemo alone due to the traumatic experience of losing the rest o fhis family to a barracuda attack, and not wanting the same thing to happen to Nemo. However, this overprotectiveness is what put somewhat of a strain between him and Nemo, as Nemo felt suffocated and oppressed by it. This is what also caused Nemo to disobey Marlin and say "I hate you", as Marlin thought he was trying to swim out to sea and get himself hurt without listening to Nemo and his explanation of the situation.

He also seems to, initially, be very serious, as shown when he couldn't tell a proper joke to some of Nemo's classmates' parents because he kept explaining obvious aspects of the joke, causing him to be considered unfunny despite the apparent notion that all clownfishes were supposed to be funny, which became a recurring gag throughout the movie as people state "He's not very funny for a clownfish. Shame".

During his journey, Marlin was impatient, grumpy, and quick to anger, as he was on the verge of losing Nemo, the only family he had left, and was rushing as fast as he could to save Nemo. This caused him to have little patience for Dory's antics and to other sidetracks.

However, despite these qualities, Marlin has proven to love his son more than anything and anyone in this world, and it is this love that fuels his determination, strength, courage, and bravery as he journeyed throughout the sea to find his son after he is kidnapped by humans. Marlin was stubborn and overcame with the bravery and courage not seen in his previous behavior to recover the person he loved most in the world despite the odds being against him.

Throughout the journey, he makes several friends and begins to understand that he should have given Nemo more freedom, particularly through his interactions with Dory and Crush because, as Dory states "You can't let nothing happen to him, because then nothing will happen to him", meaning if Marlin doesn't let Nemo grow up and get out in the world, he won't be able to live life to the fullest.

He also begins to enjoy himself throughout his journey, and slowly sheds his serious personality, as shown when he had fun when he competed with Dory in racing to see who could get out of the jellyfish valley first and finally managed to have fun with his son Nemo by the end of the film.

Finding Nemo
At the beginning of the film, Marlin and his wife, Coral are expecting 400 children, which are due to hatch soon. The two are discussing names for their children, when a barracuda attacks. While Coral and most of the eggs perish, Marlin and one slightly damaged egg survive. Marlin chooses to name his remaining child Nemo, a name Coral had liked.

As Nemo grows, Marlin becomes very overprotective of him, in part due to Nemo's unusually small right fin, which was a result of the earlier attack. One day, Marlin reluctantly sends Nemo to school. At one point, Nemo swims out into the open ocean to touch a boat as a result of a dare, much to the horror of Marlin. As Marlin scolds Nemo, Nemo is captured by a diver. However, the diver drops a mask which bears his address, though Marlin can't read it.

Marlin is able to obtain the help of Dory, who is able to read the address but has short term memory loss, and learns that Nemo has been taken to Sydney, Australia. Marlin, along with Dory, sets out for Sydney in an attempt to rescue his son. At one point on their journey, Dory is injured by jellyfish. Marlin swims through the jellyfish, and is able to rescue her. (He explains that since he lives in an anemone, he is resistant to stings.) Marlin soon passes out, and awakens on the back of a sea turtle named Crush, who is riding the East Australian Current (EAC). After Marlin shares his story with some young sea turtles, word of mouth soon reaches Sydney and eventually, Nemo.

Marlin eventually reaches Sydney's harbor by way of a whale, after becoming lost in polluted water. Nigel, a pelican who has heard of Marlin, and knows Nemo, takes Marlin and Dory to a dentist's office where Nemo was taken. There, they find Nemo, apparently dead (Nemo was actually faking it in an attempt to escape). Saddened, Marlin leaves for home, leaving Dory behind despite her claims that her memory is better with him. Later, Dory meets Nemo, and after remembering Marlin's goal, returns Nemo to a happy Marlin. When Dory is caught in a fishing net, Marlin watches as Nemo is able to successfully rescue her with skills he learned while in the tank at the dentist's office. Marlin gains a new respect for his son, and becomes less overprotective. The end of the film shows Marlin, along with Dory, waving goodbye as Nemo goes on to school.

Disney Parks
Marlin features in both the Finding Nemo Submarine Voyage at Disneyland, which features Marlin searching for Nemo, who has become lost once again. He is also in The Seas with Nemo & Friends at Epcot, which features a similar storyline.

Trivia

 * His name comes obviously from marlins which are a very different fish as they are billfish (which also include swordfish and sailfish) they are very big and powerful and they are one of the world's fastest fish.
 * In Monsters, Inc., a painting of Marlin can be seen on the wall behind the Sushi Chef.