Locked camera, preserve the supplied framing and scene. Underwater,...

“Locked camera, preserve the supplied framing and scene. Underwater, the large existing oyster partially closes and opens again around its original hinge, always keeping the pearl inside. A suspended scallop drifts in a closed arc with a gentle rigid tilt. Sand-resting shells stay fixed. Existing fish swim in coherent bounded schools, bubbles rise and seagrass sways. Sunlit caustics glide across the sandy bottom. Preserve every shell shape and count, without melting or new creatures. Complete a seamless repeating cycle with matching positions, velocities, water phases and exposure at the join; no cuts, camera drift, global fade or scene changes.”