stunningly beautiful 28 years old mermaid, (voluptuous:1.8), (extremely top heavy:1.8), sleek, powerful fish-like tail that seamlessly replaces human legs from the waist down, swimming under water in the deep ocean, upright. Create smooth, natural, cinematic motion without warping or deforming the subject. Maintain high visual fidelity and temporal consistency. Avoid adding artifacts, hallucinated objects, extra limbs, or distortions. Produce a cohesive animation with stable details, consistent textures, and clean frame transitions.