Ultra photorealistic cinematic underwater ocean photograph, adult woman 24 years old, floating horizontally on her back beneath clear turquoise seawater, viewed in side profile from a low underwater perspective, head toward the right and long legs toward the left, torso gently arched toward the surface, both arms raised above her head, hands open with relaxed fingers drifting weightlessly, very slim naturally athletic feminine figure, narrow waist, long lean torso, softly curved hips, fair lightly sun kissed skin with a smooth even complexion, realistic pores, fine peach fuzz, subtle natural redness and luminous sheen, soft oval face, delicate tapered jawline, pale blue gray eyes, natural eyebrows, medium full natural lips, calm dreamy expression with lowered eyelids, extraordinarily thick blonde hair formed from dense corkscrew curls and long springy spiral ringlets, the entire mass almost completely weightless underwater, rising strongly away from her scalp and floating far outward in every direction around her head shoulders and upper torso, countless curls suspended independently, some spiraling upward toward the surface, others drifting sideways and trailing far behind her, creating a large soft three dimensional halo of buoyant floating blonde ringlets, the longest curls extending far from her body and undulating gently with the water while preserving their coiled structure, wearing a minimal classic white bikini with delicate side ties floating softly away from her hips, around her neck a delicate fine silver chain carrying a polished oval turquoise gemstone pendant set in a simple handcrafted bezel, the saturated blue green stone catching soft aquatic highlights and hovering weightlessly above her sternum, the pendant moving subtly with the water and creating a small elegant focal point against her skin, overhead sunlight creating moving caustic patterns across her body and swimwear, tiny bubbles drifting upward, exceptionally clear water, luminous turquoise gradients, realistic underwater refraction, soft suspended particles glowing in the light beams, a pale sandy seabed visible in the lower distance with softly rippled sand shaped by gentle currents, subtle patches of low marine vegetation and scattered small rocks adding natural ocean depth, a distant school of fish far in the background, softly blurred and understated, adding atmosphere and a believable underwater world without distracting from the woman, gentle surface shimmer above, subtle depth toward richer blue below, warm natural skin tones, high micro contrast, restrained analog grain, 24 mm full frame underwater photography, cinematic realism, graceful weightlessness, detailed photorealism