The animated clownfish in question is Nemo, the titular character of the 2003 Pixar film 'Finding Nemo'. Nemo is a young clownfish who embarks on a journey to find his father after being separated from him. He is accompanied by his friend Dory, a blue tang fish, and they encounter a variety of sea creatures along the way. Nemo's story has become a beloved classic, and he remains one of the most iconic characters in animation.