Skip to content It sounds like you're referring to a Brazilian children's animated video or song: (Bento and Toto - Bottom of the Sea).
Since you asked to — I’ll assume you want to expand this into a rich, educational, or narrative-driven feature based on that underwater children’s drawing/animation concept. Bento e Toto - Fundo do Mar -Desenho Infantil-
Select your favourite hero and dive in to the action!