Create an animated scene featuring a playful, energetic character

Create an animated scene featuring a playful, energetic character (such as a lively mermaid or a cheerful dolphin) splashing and flipping joyfully underwater. The character should have a big smile, with bubbles and waves surrounding her to convey the fun and excitement of the moment. The underwater scene should be vibrant and colorful, with bright coral reefs, tropical fish, and sunbeams piercing through the water. The character should clearly stand out as the star of the underwater adventure, showcasing her confidence and happiness as 'number one' in her aquatic world.