Nemo is a young clownfish who lives with his father Marlin in the Great Barrier Reef. Nemo, despite being hampered by a lame fin, is eager to explore life around the ocean. Marlin, however, is overprotective of him, having lost his wife Coral and all their other eggs in a barracuda attack, leaving Nemo as his only child. On Nemo’s first day of school, Marlin embarrasses him, and while Marlin is distracted with the teacher, Mr. Ray, Nemo defiantly sneaks away from the reef toward a speedboat, where he is abducted by a scuba diver. Marlin tries to chase the boat and meets Dory, a blue tang who suffers from acute short term memory loss, who accompanies him. During an encounter with three sharks who have sworn to abstain from eating other fish, Marlin notices a diver’s mask that fell from the boat that took Nemo. Marlin and Dory fight over the mask, giving Dory a nose bleed, which sends the sharks into a feeding frenzy, and Marlin and Dory narrowly escape, but are knocked unconscious when the sharks accidentally set off an old mine.