On the way he meets Dory ( Ellen DeGeneres), a cheerful blue tang who has a problem with short-term memory loss. On a journey that will introduce him to extraordinary characters and teach him a great deal about the world and even more about himself, Marlin must go literally to the end of the ocean to find his son and bring him home. But Marlin's worst fears are realized when Nemo is captured by a deep-sea-diving dentist who collects fish for his aquarium.

Marlin has done a good job of making Nemo feel confident and unselfconscious, but he's still overprotective, which makes Nemo anxious to prove that he can take care of himself. When it's time for Marlin's surviving son, Nemo (Alexander Gould) - who has an underdeveloped fin - to start school, the little guy is excited, but Marlin is terrified. In FINDING NEMO, clown fish Marlin (voiced by Albert Brooks) is a fond but nervous dad - understandably so, since a predator ate his wife and all but one of their eggs.