The central character is Nemo the son of Marlin a clownfish. Marlin is concerned about Nemo's safety but a scuba diving dentist captures Nemo.

电影的主要角色是小丑鱼马林的儿子尼莫，尼莫被潜水的牙医捉走，马林非常担心儿子的安危，并展开营救尼莫的任务。