Final answer:
Sebastian bursts into the scene with Aquata and Andrina in 'The Little Mermaid.'
Step-by-step explanation:
In "The Little Mermaid," the character who bursts into the scene with Aquata and Andrina, creating angry ripples in the water, is Sebastian. Sebastian is a red Jamaican crab who serves as King Triton's advisor and is known for his musical talents.