Full-length rear shot of a young woman standing in the ocean surf at the beach, seen from behind facing out toward the sea, wearing a minimalist black thong string bikini. Posing gracefully with one arm stretched high overhead and the other hand touching the back of her head, dark hair flowing. Frothy ocean waves washing around her legs. A wooden pier with pilings visible along the right side under a bright, sunny blue sky. Eye-level, natural outdoor sunlight, clear water, realistic vacation photography, vertical composition.