Scooped up and carried off by a scuba diver, a brave little clownfish named Nemo finds himself living in a tank with a zany group of tropical fish. While Nemo and his friends plan a daring escape, his father, Marlin, searches for his son—facing hungry sharks, a frightening anglerfish, and an enormous whale!
　　勇敢的小丑鱼尼莫被带着呼吸器的潜水员捞起来带走了，之后他发觉自己和一群滑稽可爱的热带鱼住进了鱼缸里。当尼莫和他的小伙伴们在策划大胆的逃跑计划时，他的父亲马林也踏上了寻找儿子的漫漫征程。马林一路险遇了饥肠辘辘的鲨鱼群、让人毛骨悚然的琵琶鱼和硕大无比的鲸鱼，克服万难终于与儿子平安团聚。