Body full, 18-yo., Photorealistic underwater close-up shot matching the reference, camera locked and fixed, no movement, no zoom, no push-in, 120fps. Beautiful mermaid with long dark flowing hair, highly detailed realistic wet skin, blue mermaid tail, large soft breasts, underwater. A muscular man stands mostly still with small natural breathing movements. A thick hard detailed erect cock exactly matching the reference stays completely rigid and natural, never deforms. From the very first frame the mermaid floats slightly upward and shifts her body a little to the side to better align with the cock. She reaches with both hands, gently holds the thick hard cock and guides it toward her face. She moves her head forward and slightly to the side, opens her mouth wide and takes the cock cleanly into her mouth without the cock passing through her head. Once inside she begins a deep rhythmic blowjob, moving her head left and right with small rotations while taking it deeper. Her long dark hair floats and sways naturally in the water. Her mermaid tail makes small natural swaying and fin movements. Small fish swim, seaweed sways, air bubbles rise. Strict real-time normal speed, natural pacing, absolutely no slow motion. Clear anatomically correct sequence, she floats up and shifts side → holds cock with both hands → moves head forward and side to align → opens mouth → takes cock cleanly into mouth → starts rhythmic left-right deep blowjob. Rigid natural cock that never deforms. Underwater ambience with soft muffled wet sucking sounds, gentle water movement, soft female breathing, quiet excited sounds. Pure visual video, absolutely no subtitles, no text, no captions.