Nemo is the main character in the movie. He is the son of Marlin and he goes to touch a boat and he gets caught by the fishermen on the boat. Nemo is brought to a dentist office and put into the fish tank there where he makes friends but, he misses his father.
Dory is another main character in the movie. She is a fish who has short term memory loss and she becomes friends with Marlin in the beginning of the movie and she helps him the whole way to try to fimd Nemo.
Marlin is another main character in the movie. He is the father of Nemo and he is very protective. When Nemo gets taken away he goes through the whole ocean to try to find him and on the way he meets a lot of new friends and learns a lot of things. Marlin finds Nemo by the end.
Squirt is one of the turtles that Marlin and Dory meet during there adventure to find Nemo. He helps them get to their destination. He is little sea turtle who is swimming in the ocean when they find him.
Bruce is a Great White Shark that Marlin and Dory meet in the beginning when they first start to look for Nemo. At first they were afraid but, then the sharks were nice to them so they helped them find the address of the dentist where Nemo is.
Gill is one of the fish that is at the dentist office in the tank with Nemo. Gill is the wisest fish in the tank. He is always trying to make escape plans for Nemo to get back to the ocean to find his father. He has been in the tank for the longest and knows what to do so he is the one who helps Nemo escape down the drain.