The term 'Clownfish of Film' refers to the character Nemo from the 2003 Pixar animated film 'Finding Nemo'. Nemo is a young clownfish who embarks on a journey to find his father, Marlin. Along the way, he meets a variety of characters, including a friendly fish named Dory and a group of sea turtles. The movie was a huge success, grossing over $936 million worldwide and winning the Academy Award for Best Animated Feature.