Nemo is the titular tritagonist of the 2003 Disney Pixar animated film Finding Nemo and a major character in its 2016 sequel. He is the only living son of Marlin and his late wife, Coral. Nemo is a small and slender orange clownfish with white stripes, small black stripes, freckles, scarlet eyes, and an underdeveloped right fin, known as his "lucky fin."

Source: Disney Fandom