Nemo is a young clownfish and the main character in the animated film Finding Nemo. He is known for his adventurous spirit and distinctive physical appearance, including a small fin that makes him unique. The story follows his journey as he gets captured by a diver and his father's quest to rescue him. Throughout the film, Nemo learns valuable lessons about bravery, friendship, and the importance of family. His adventures take him through the vast ocean, where he meets various sea creatures, including Dory, a forgetful blue tang fish who becomes his loyal companion.